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I have a PC running Windows XP SP2, and I face a problem in it and need my PC to boot in safe mode.

But when I choose safe mode from the boot menu, my PC restarts automatically!
So what's the problem?

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does it start loading a couple drivers and then restart? Can you hear anything odd? light clicking or grinding? I had a computer yesterday do this and it was a hd failing. – Logman Aug 4 '12 at 18:18

You should get a linux livecd (SystemRescueCD or Parted Magic) and see if you can mount the hd. If you can, back up your data before you start trying to fix anything.

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Yes, it's loading some drivers and then restarts! and I don't hear anything odd! Thanks for the link. Any other ideas? – Mark Aug 4 '12 at 18:30
    
if you can mount the hd, you can run tests on the hd (SMART/TestDisk). HD could be failing, partition corrupted... alot of things. If the hd is fine, it would be easier to do a complete install. Recover data before you do anything... – Logman Aug 4 '12 at 18:45

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