What is the error message that goes with this BSOD?
Is it "Inaccessible Boot Device"?

Also what's your configurastion, particulary disk drive(s) and disk controller.

Just says "a problem has been dected and windows has been shut down to protect your computer. Check for virus etc. We are using the on board disk controller and it has two drives c and d. When i start in Directory services recover mode it checks the drives and says they are both clean

Has there been any change to your system? New hardware or new drivers?

In the BIOS, is the Hard Disk 0 set as the first Boot device?

Do you get as far as the moving rectangles going across the screen?

The Master Boot Record is OK - you're past this stage because you can get into Safe Mode. This also means that your partition table isn't corrupt.

The NTLDR stage is working, again because you have a choice offered to go into Safe Mode.

But when you trry to load the Normal system it can't find a good configuration and then tries (and fails) to load a lst known good configuration.

There seem to be few, if any, easy ways out of this. One could through the motions of checking your disk for faults (CHKDSK /F) - but first get your key data files off on the outside chance of something going wrong.

But the usual remedy is to repair Windows and bring it back into a state of grace.

chkdsk/f says all is fine. machine boots in safe mode fine using directory service recover option.

Machine does give windows startup screen with bar moving accross about 20 tmes

Hi,
If you can use a friends PC, take your OS disk and download Bart PE. at http://www.softpedia.com/get/System/...-Builder.shtml
Make a boot disk from your OS disk, take it home, boot from it and fix most problems in windows start-up.

Have a look at the attached PDF.

You've got at least as far as the Kernel Load portion of the boot process.

If the bar isn't the rectangles I mentioned but is like a bar meter, then you've progressed to Kernel Initialisation stage. If Windows tries to re-boot (which it did before you changed the registry), then you've reached the I/O Manager stage. Here's where it appears to fall down: You don't have a last known good configuration. The problem could be a driver or the Registry having been corrupted (by what?).

That is why, if you don't have a System Restore Point that goes back far enough, you won't recover without rebuilding Windows. What is your status with the restore point?

I have tried to restore from 3 different dates and it starts the process then aborts and says "Restore point could not be completed" and quits.

Then you are going to have to repair Windows.

This is as good as any guide:
http://www.geekstogo.com/forum/How-t...s-XP-t138.html