How To Fix System is not booting

TIP: You should click here to fix Windows errors and optimize system speed.

Most computer errors are identified as internal to the server and not actually concerning the hardware or any device that can be of concerned to the user. One example is a system error where the problem violates the procedural rules. System errors are not recognized by an operating system and it notifies the user with the message, “A system error has been encountered. Please try again.”

A system error can be fatal and it happens when an operating system stops for a moment because it is in a condition where it is no longer operating safely. Some of these errors are stop error, bug check, system crash and kernel error.

If you have turned your computer on and you noticed that Windows will not start, you are experiencing a Boot Error. Some of the reasons why your Windows fail to start when your system partition is corrupted, has missing files or damaged. Once you encountered a boot error, you will see messages such as these:

  • Reboot and select proper boot device
  • Bootmgr is missing
  • Missing operating system
  • FATAL: No bootable medium found! System halted
  • Error loading operating system
  • Invalid partition table

Some versions of Windows can recover from these problems by automatically running a Startup Repair. Otherwise, you can manually use the Windows Recovery Environment to troubleshoot the problem.

From the Forums

A user in the forum details it further:

YOu would be very surprised at how many BIOS flash failures occur. Note: It would be worthwhile to re-seat everything on the mobo once again.   Take out your mobo battery and leave it for about 10 minutes to try and reset your BIOS. (If another method is explained in your mobo manual then please use that.) Take out your RAM, clean them and put them back again . Most common is a failed BIOS flash.

Power supply is ok but cpu led is not lighting. There is no bios posting. There are many reasons for the BIOS to fail. For maximum stability always fill the first RAM slot before the others.

The most common reason for the POST to not occur is a BIOS failure (assuming power supply is working). My config is phenom 2 x2 550 and biostar 790gxe ram corsair, hdd 500gb seagate power supply cooler master 460watts. CPU fan is working, I am not getting any beeps Please help me   Some problems will cause the Power On Self Test to not function at all.

Other reasons for BIOS failure are, BIOS corruption due to virus or malignant code, static charge, electrical surge, and physical damage to pins.

What causes System is not booting

Corrupted system files in the Microsoft Windows system can happen and it shows in the system error reports. Though an easy solution will be to reboot your computer, the better way is to repair the corrupted files. Microsoft Windows has a System File Checker utility that enables the users to scan for any corrupted file. Once identified, these system files may be repaired or restored.

There are several ways to fix fatal system errors.

  • Disable driver signature enforcement
  • Use DISM command
  • Replace corrupted files
  • Run a SFC scan
  • Repairing your registry
  • Remove your recently installed drivers or application
  • Install latest updates on drivers
  • Roll back the drivers

Seeing that Windows fail to boot can be stressful but there are several ways on how to fix boot errors. Most cases of boot errors will instigate Windows to automatically run a repair setup. It will scan problems and try to fix it up. Another way is to boot from the Recovery Partition or the Windows Installation Media. Your computer has a special recovery partition that enables you to boot in the Windows Recovery Environment. There is no need for a physical disc.

However, some computers do not have a recovery partition hence the need to use a physical disc containing the Windows installer. If the two options fail to work, you can drop to the Command Prompt at the Advanced Options page to fix the problem.


More info on System is not booting

RECOMMENDED: Click here to fix Windows errors and optimize system speed.

System not booting properly. System Repair gives a Blue Screen.

Try closing BIOS.

*** STOP: 0x000000F4 (0x00000003, 0x83FFE330, 0x83FFE47C, 0x81254336)

What do I do to fix this problem? A recent hardware or software change might be the cause.
1) Try system repair
2) Insert Recovery Disk. When I try system repair I get a blue screen which says the thread had to terminated. and lately whenever I switch it on Windows Boot Manager appears with the following message.

File: \$ Windows.-BT\ Windows\ System 32\ winload.exe

Status: 0xc000000f

Info: The selected entry could not be loaded.

I have a Dell Inspiron 1525 running on Vista Home Basic 32-bit SP1. Application might be missing or corrupt

after which I get the following options

Windows Setup
Windows Vista

and when I enter Windows Vista.

Would be highly appreciated if you could help/

I get my perfectly normal OS that has been installed with all of my data. Windows failed to start.

PROBLEM: System Not Booting Up - System Has An AGP

The solution would be to remove the AGP video card, firmly seat the memory DIMM (s) and then replace the AGP video card. OPERATING SYSTEM WINDOWS XP HOME EDITIONsystemax tech support offers the following:PROBLEM: System Not Booting Up - System Has An AGP Video Card And Uses DIMM Memory (Article: 394) SummarySystem Not Booting Up - System Has An AGP Video Card And Uses DIMM Memory SymptomSystem does not start up, there is no post, no video, and no diagnostic beeps - system appears dead CauseThe AGP video card and the DIMM memory may have been installed out of sequence ResolutionIf the DIMM memory is installed after installing the AGP video card, the bottom edge of the video card may be holding down the lock levers on one end of the DIMM sockets. The result is that the memory DIMM may not seat properly and cause the system to not start up.

Both locking levers must be up against the side of the DIMM for proper seatingMy problem is that these two cards are far apart in the case and have little to do with each other.  Is sequence really that important when both cards are so far apart?  Is it possible that the video card is just bad or defective?What should I try next?these are the specs for the two cards in question:(1) 256MB DDR266 PC2100 Non-ECC Memory (256MB x 1(1) nVidia GeForce 2 32 MB Graphics Card w/ TV Out Any help would be appreciated. Dwayne....In your case the fact that you have a AGP card and dimm sockets has nothing to do with your problem. The ar...

new KV8 Pro system not booting up ...

Could it be overheating? I'm not sure what this is telling me, as I don't know exactly what VCC means, perhaps some more research is in order ...

Anyone know where a more complete listing of these POST codes might be (the ABIT website does not have them it would seem)? which if you check is not in the official manual.

Just hooked everything up, I have experience with system installs so I'm not a total noob, but I'm getting these symptoms: loud multi-tonal beeping, POST codes on the debug LED that aren't in the manual, no output to monitor. My specs are:

Antec 430-watt PSU
AMD64 3200+
ATI 9800+ Pro
Koolance Exos watercooling
noname RAM that I've tested and works

I've removed everything from the mobo, to where only the necessary PSU connectors and the processor are installed, and I still get the same error: hang on code 0.4. But my thought is that it should atleast boot for a little while even without any cooling right?

I just purchased a Abit KV8 Pro.

I just flushed out the fluid and replaced it with fresh koolance coolant, so overheating might be possible, because it takes a while for the system to get to optimal cooling levels. The code it seems to hang on is 0.4. LED1 is green, but LED2 is red.

There were other codes not in the manual as well, but none perhaps worth remembering. Any help would be appreciated.

Also I just noticed ...

System getting Off during booting

system is not displaying any message

But i am able to login in 2003 server & it is working. I have formatted vista drive.Now whenever i am going to install vista with bootable CD system is getting off. Can anybody tell me how to overcome this problem.Why during booting system is getting off ?

My laptop is Toshiba sattelit A-300 Series

PLEASE Help with system booting!

After that, after a reboot, Windows XP would try to load, then a blue screen would flash, and it would reboot. Definitely sounds like a hardware issue. I would first try one stick of memory at a time. Is your Cpu and Motherboard temperatures in order?

Possibly try another PSU and or Hard drive if they are available.
To give some background, it has a 2.4 Core 2 Duo E6600, 4 GB of 667mhz RAM, 2*250 GB hard drives, Nvidia 9800 GT XLR8, one dvd-cd-lightscribe burner, one HD DVD drive, Sound Blaster Titanium, and has worked well (actually, phenomenally since December of 2006. I let it sit for hours, but it doesn't move forward. After doing a system recovery, (I formatted the hard drive to make sure EVERYTHING was gone.

Please, what do I do? I've had absolutely NO slowdown in performance until recently.) To describe the problem, my computer has been slowing down, and freezing every couple of seconds for just about three seconds at a time. After a couple reboots, it finally logged on.

Then, when I did a disk check, there were 31,000 security log problems.

I have an HP Pavilion D4650y. When I booted it, sometimes it would log on slowly, and then other times it would just not log on at all. So, my recovery partition was deleted.) I tried to go into the BIOS to reset the booting permissions to boot from the hard drive, except it freezes when I try booting into the BIOS.

HJT Log.....system keeps re-booting??

Double click the Mwav.exe file. Did you install any new software or hardware lately before this happened? Select all local drives, scan all files, and press SCAN. Let it load from the floppy and run the memory test for about 15 minutes.

If no errors show up, you may exit the program and take out the floppy. If necessary, change your bios to boot from the floppy drive first. Reboot into Safe Mode.
3. In the Virus Log Information Pane......

Save it to a folder.
2. Let's also check for any possible trojans/viruses:

Please empty any Quarantine folder in your antivirus program and purge all recovery items in the Spybot program (if you use it) before running this tool. Once you copy that to a Notepad file...highlight the text and copy it here.

Here's the hijack this log file........ Restart your computer and insert the floppy. Download the Mwav virus checker at (Use Link 3)

1. We are not going to use this to remove anything...but to ID the bad files.

Let's see if it's a memory/ram problem:

Download the Windows Memory Diagnostic Tool and install it on a blank floppy disk. This is a stand alone tool and NOT just a virus it won't install anything.
4. When it is completed, anything found will be displayed in the lower pane.
5. Left click and highlight all the information in the Lower pane --- Use &CTRL C &on your keyboard to copy everything found in the lower pane and save i...

Booting up System


When I turn on my computer it starts to boot up but never boots up sucessfully. Did this happen after installing/removing any software or hardware?

It does this continously in a loop.

Any suggestions on how to resolve this problem?

Tap F8 continuously every second as the computer boots. If not, its a hardware problem most likely. Version of Windows? If the computer boots up OK there, its a software problem.

If you tell us something about the computer, we could possibly help more. That should drop you to a menu where you can choose "safe mode without networking". An error message come up but disappears too quickly for me to read and then it starts the boot process again.

Booting the system

i've xp installed on my system what files i must copy on my usb to make it bootable.

i want to boot my computer from the usb. Not unless your motherboard supports USB and in any case, current Widows versions do not support USB devices as the primary boot device.

my system does not booting

i insert the disk in cd rom and press enter but the same message come.i switch off the system and restart the computerfrom plug but the computer does not start and a long beep and then small beep comes.and the system and harddisk bulb get off. now i tell you what happens.i am a new user.the configuration of my computer is P4 1.7 ghz,128 sd ddr ram(266 mhz) ,mother board microtech website( with via P4m266 chipset with on board sound and graphic card. i also try the jbat1 set theCMOS setting to default but it does not work.i also taken out the motherboard 3v lithem battery for 2,3 minutes but it also not work.please guide me.


i go to the BIOS setting ,then i go to m Frequency/voltage control.there are following setting

1)cpu clock ratio -10x to 24x--------i set it to 10x

2)auto detect pci/dimm clk--------i does not disturb the setting

3)spread spectrum---------------i does not disturb it

4)cpu host/pci/3v66 clock--------100/66/33 mhz

102/68/34 mhz

105/70/35 mhz


123/82/41 mhz------------ i set it to 123/82/41 mhz setting and press f10 to save and press enter to yes.the system goes to start again but not starts.a line written on the screen is"the system doesnot booting up please inseart system disk in 'a' and press enter

i insert the cd which comes with the mother board (name software driver v4.6 and via-p4m266(p...

System is not booting up

My system is getting 3times beep sound and 3 times led blinking while power on the system and its continuous for 5 times . After that it's blinks same with out beep sound and also there is no display

My system is not booting

i accidently delted boot.vbs file from my system after that my sytem is not booting up.It will start and then show my logon screen and when i press my user icon it will say loggin off and then show the same blue log on screen. i tried my best but couldnt help it out. please reply me if you need any further clarification.

I have Win xp.

System Booting

We need more details of your problem really before we can help. What is the make and model of your computer? Do you have a Windows disc?

Please make a note of any error messages etc and post them back here. What exactly happens when you try to start your computer?

System Not Booting At All

The ram to be sure it is secure?

However, the computer is not booting up whatsoever!! Have you checked the monitor connection? Does anything happen?

So I thought a new power supply and that was replaced and the power is now working. I have checked all the connections again, but no luck. Does it sound like it's trying to boot?

I have a Dell Dimension 4500 that I am fixing for a friend. The power supply fan was not moving. He said it was coming up with "the blue screen" then when I went to see it, it would not even power on.

win 7 not booting in XP system

I am basically just explaining what many others have already stated in many topics in a search on dual-boot and you'll see how it
works....on a seperate drive W7 creates a 200mb partition on it's disk for it's bootmgr info, on a partition of a drive with an existing OS on partition 1(ie WXP) it will place the bootmgr info on the partition 1 of the drive... From within win Xp, win 7 installation files are in F: drive only. But the installed files are still there in F drive. One peculiar thing I noticed is, although I installed win 7 to F: drive, when seen from within win 7, the installation drive was shown as C: drive.

XP boots fine. Is this the problem? C:\ had XP. Code:
There are a total of 2 entries listed in the Vista Bootloader.

Configured EasyBCD from within XP, but there is no effect in boot.ini of XP. Instead it goes to the win7 install screen. then select the WXP disk in the bios when you want to boot WXP.... Later i found that windows 7 would boot (with the windows 7 boot manager) only when the windows 7 installation disc was on dvd drive.Otherwise only XP is shown in the boot selection menu - the standard old menu.

if you were to install it onto the same drive as WXP but a different partition on that drive then all the info for booting W7 would go onto
the same partition as WXP is on, running EASYBCD on W7 would allow you to set it up so either OS could be selected at boot time...running EASYBCD on WXP with W7 installe...

my system is not booting up, why??

PSU is a bit weedy - have you tried booting with just one RAM chip installed and no drives connected?

System not booting up

I used to be able to pull the plug, press the power button, insert the plug, then it would work again (When the problem was smaller), but now it rarely will turn on. If I turn the system off by any means, it won't boot back up again unless left turned off for about 20 hours.

Ok, an old system of mine has had a steadily more common problem, which is now really getting on my nerves. It DOES turn on, but nothing appears on the monitor, and there are no BIOS beeps at all (No errors, no single beeps to show everythings ok). *sighs* Anyone have a solution?

750mHz Athlon
312mb RAM
GeForce3 Ti200 (Doubt this has anything to do with it)
And an old VIA motherboard, not sure of the make/model though.

Check the motherboard for blown capacitors, look at the capacitors and see if any are bulging or if there is any brown residue at the base of them.

Booting up the system

I did a reformat of the hard drive C: NTFS and everything seemed to check
out and no errors
When I closed the system down and then tried to power it up I started having the same problem again. Thank You

It would be helpful if you filled in system specs. after several times it will bring up Vista.

But it's just guessing unless you provide specifics.

Various manufacturers use different schemes with the BIOS set up program. would appreciate any thoughts or suggestions. I don't think it is the hard drive.

Seems a problem when booting you get to the screen where you have
F2 and F10 and then F11 where you can re install the factory settings. never had this problem with other machines. would it be the BIOS ? Now I was able to install Windows XP Pro.

Some have hidden partitions.

I bought a used Compaq system. The system hangs and the only way out is to reboot. This could have gotten hosed when you installed the OS.

After several re boot XP came up and ran without problems.

Please Help Me w/ Booting My System (Win XP)

zzz I did that... but the same thing happened, and I couldn't get into the User Log In menu, and remained stuck on the screen that allows you to choose from "Safe Mode" "Safe Mode w/ Networking" "Safe Mode w/ Command Prompt" "Last Good Config..." and "Normal"

lol, so that kind of sucks. If you select safe mode what happens?

And not only can I NOT get into my account, but that I fear I may have screwed up big time with that. well, I was in the middle of doing the steps needed to help free my computer of Maleware and the sorts (via, until I got to the rebooting in Safe Mode part. if anybody can help guide me, I'd very much appreciate it since, the last thing I'd want to resort to is getting the computer fixed the old fashion way. (um... But hey...

however it's done, that is)

I'm unsure what you are saying. What do you mean by you are stuck on the screen that allows you to start in safe mode. Well, my problem during that step changed when I couldn't boot in Safe Mode, so I followed the link to where it directs you to "reboot in Safe Mode using msconfig." SO!

Have to keep re-booting system

HiI'm on NTL Broadband, have just installed Windows 98 Second Edition and a problem has occured which I didn't have before. TO VIEW INTERNET CONTENT THAT HAS BEEN SAVED ON YOUR COMPUTER, CLICK WORK OFFLINE. If not, come back and I or someone else will try again.
Try clicking on My Computer then Dial Up Connector and disable all reference to the Dial Up Connection.

CLICK TRY AGAIN TO ATTEMPT TO CONNECT.I find this very strange indeed, because to get online again all I have to do is close down Windows, then re-start.The same happens with Outlook Express - if I leave the computer at all, I'm 'cut off, until I close down and start again.NTL Technical Support Desk say I should try Tools, Internet Options, Connections, then LAN setting, but this does not solve the problem. This may do the trick. I start Windows OK, no problem; can get into Internet Explorer 6, no problem, and Outlook Express, no problem, but if I leave the computer for any length of time - either on stand-by, or if the phone rings, I find that when I start where I left off, I get a warning saying NO CONNECTION TO THE INTERNET IS CURRENTLY AVAILABLE. Your Broadband connect is via cable and therefore should not be influenced at all by the phone under normal circumstances.

System re-booting

Any ideas? I don't think the Spysweeper trial period will be related at all as they're quite a renowned company, though I don't use the product myself. If you haven't got the program, it can be downloaded for free at the following address:

Run it and choose to save a log file then post the results so a spyware expert can have a look please. could be a number of reasons why its rebooting but in order to find out whats causing the problem, some more info is needed.

If so, what exactly? It may also help to see a HiJack This log file - which you can post on the Hijack This board as there may be a spyware/malware issue. When the system reboots, does it go through the normal process i.e loging off, saving files etc the starts up again or does the power just reset in an instant? I have heard it come back on from the other room. (Kind of creepy in the middle of the night.) I run AntiVir anti virus and it says that there are no viruses in my computer.

Have you installed any new hardware recently?

I am not very savvy, technically speaking, and have been having a recent problem that I am looking for help with. I run Win XP and my system has been rebooting at random. What program have you used to scan for viruses and it is up-to-date in terms of definitions?

Hope that helps :-)
Sometime when I or my family is using it and sometimes when no one is around. I started having this problem after my free 14...

LATEST TIP: You should click here to fix Windows errors and optimize system speed.

Recommended Links:

(1) Download (System is not booting) repair utility.

(2) System is not booting

(3) System not booting properly. System Repair gives a Blue Screen.

(4) PROBLEM: System Not Booting Up - System Has An AGP

(5) new KV8 Pro system not booting up ...

Note: Manual troubleshooting of System is not booting is only recommended for advanced computer users.Download this automatic repair tool instead.