PC turns on but then restarts

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My Windows 7 PC will let me log on and the desktop comes up but the computer restarts before it finishes loading. This started suddenly and I hadn't installed any new programs recently and tried uninstalling any programs that I haven't had very long.

I don't think it's an overheating issue because it works fine in safe mode for long periods of time.

I have tried to run the recovery program but it doesn't fix the problem. I have run antivirus, spyware, and malware programs from safe mode but they all say there are no problems.

I also tried to reinstall windows but it restarts before the installation finishes.

I don't know too much about this stuff and any help would be appreciated.
I have already backed up all of my files so losing them wouldn't be an issue.

Thanks for any help.

Also, it takes a longer time from entering password to showing the desktop.

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Hello,

Try this 1

Make sure that the drive doesn't contains any errors.

Go to Safe Mode.

Open "My Computer" --> Right-click on your OS drive --> Properties -->

Click on "Tools" tab --> Under "Error-checking", click on "Check Now" button.

In "Check Disk" window, select "Automatically fix system file error" and "Scan for

and attempt recovery of bad sectors" options and click on "Start" button.

Good Luck
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I tried that but got the message "Windows has checked the file system and found no problems."

Nothing has changed.
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It isn't a branded PC.

I have done everything I know to do in safe mode and the only thing I know is the following error is given when the unexpected shutdown window pops up.

Problem signature:
Problem Event Name: BlueScreen
OS Version: 6.1.7601.2.1.0.256.48
Locale ID: 1033

Additional information about the problem:
BCCode: 124
BCP1: 00000000
BCP2: 87C0F024
BCP3: 00000000
BCP4: 00000000
OS Version: 6_1_7601
Service Pack: 1_0
Product: 256_1


I have no idea what that means or what to do with it.

Thanks again for any help.
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Thanks. I'll do that this evening.
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http://speedy.sh/VgnPw/060513-33243-01.dmp

Is that what you needed?
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Hello,
Try this 1
1) Make sure that your are not overclocking the CPU.
2) Update all your drivers.
3) Remove the RAM from the slot, clean it and place it back properly or try another slot. If you are having two RAMs then remove it, place only one RAM and check the display. If your problem still exist then change the slot. If you still getting the Blue Screen Error then try the above procedure with the other RAM.
4) Remove the dust from the CPU FAN. If possible remove the old thermal compound from the processor and make sure that your CPU FAN is also clean without any thermal compound.
Now freshly apply some thermal compound in the middle of processor and fix the CPU FAN properly.
Good Luck
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How do I check to see if it is overclocked?

I don't think that it is a hardware issue since it will run in safemode for days at a time.
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Hello,
Try this 1
Go to BIOS --> Load default settings --> Set the first boot device to hard drive --> Save and exit from it. This will reset the clocking to default.
Try remaining steps also.
Good Luck