How to get Windows 7 out of a boot up loop?

The machine got hung up one day and was unresponsive, meaning that everything was frozen so that she couldn't shut down the machine.  So she just turned it off.  Then when she tried to start the machine it just hung up with the windows icon but it stopped moving.  

So I tried booting into safe mode.  During boot up in safe mode the driver files that aren't loaded go by on the screen, then a blue screen flashes up for less than a second and the machine reboots.  I tried all 3 safe boot options AND the boot to a previous know configuration.  All have the same response.

Any idea as to where to start with this problem?  I have not encountered this before.

Thanks,
elentiniAsked:
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PowerEdgeTechConnect With a Mentor IT ConsultantCommented:
Boot to your Windows 7 DVD and select Repair your computer ... let it repair and reboot as problems are found.  You may need to do this twice.
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SalmoneusCommented:
Could be a hardware issue. Try a memory test, like memtest from a bootable cd, to check for faulty RAM.

/Salmoneus
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chirraCommented:
You can use the Windows 7 OS CD/DVD to get out of the Boot loop.

You can reinstall the whole OS if required ( I suggest to restore it to a previous restore point if any)
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Grant BerezanConnect With a Mentor Senior Network EngineerCommented:
If you really want to diagnose the issue, boot up to the F8 menu and choode advanced options, then choose "Disable Automatic Restart on System Failure" Then, the next time you boot safe mode , the machine will stop with the BSOD visible and you might get a clue to where your root problem is.
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tobyhutton1234Commented:
Suggest you get that windows 7 dics out and do a repair, if all else fails then a clean installation.
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elentiniAuthor Commented:
I ran the repair disc and it said that it did the repair but same behavior.  However, when I stop the automatice systemj restart I get the error message, "Unmountable boot volume".  So then I ran the system diagnostics and all was good.

Any thoughts as to what is the problem or do I just need to try to reformat and reinstall the OS?

Thanks,
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PowerEdgeTechIT ConsultantCommented:
If you haven't already, I would try the Repair from the disk again.  I have on a few occasions had to repair twice before it booted normally.  You can also try a System Restore from the Repair your computer options.
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