when windows tries to boot it gets part way in then blue screens witj
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STOP: C0000218 {Registry File Failure}
The registry cannot load the hive (file):
\Systemroot\System32\Config\SAM
or its log or alternate.
It is corrupt, absent, or not writable.
Beginning System Dump of physical memory
Solution
1. I imaged the drive to a new disk and selected the option to ignore disk errors
2. the new disk still reported same error
3. Booted from XP CD and select R for Recovery Console on the first screen pause
4. looked at microsoft site http://support.microsoft.com/Default.aspx?kbid=307545
5. ran these commands
At the Recovery Console command prompt, type the following lines, pressing ENTER after you type each line:
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md tmp
copy c:\windows\system32\config\system c:\windows\tmp\system.bak
copy c:\windows\system32\config\software c:\windows\tmp\software.bak
copy c:\windows\system32\config\sam c:\windows\tmp\sam.bak
copy c:\windows\system32\config\security c:\windows\tmp\security.bak
copy c:\windows\system32\config\default c:\windows\tmp\default.bak
delete c:\windows\system32\config\system
delete c:\windows\system32\config\software
delete c:\windows\system32\config\sam
delete c:\windows\system32\config\security
delete c:\windows\system32\config\default
copy c:\windows\repair\system c:\windows\system32\config\system
copy c:\windows\repair\software c:\windows\system32\config\software
copy c:\windows\repair\sam c:\windows\system32\config\sam
copy c:\windows\repair\security c:\windows\system32\config\security
copy c:\windows\repair\default c:\windows\system32\config\default
6. Type exit to quit Recovery Console. Your computer will restart.
7. the computer restarted Ok and I could login and see files, however there was some problems with some programs like microsoft registration page not showing any text
8. so I did a repair install of windows
ie boot from Windows XP Home upgrade CD and select Repair install.
9. Now the PC tries to boot and then restarts again through the booting process. So I have an unusable PC again.
10. Tried step 5 again ie copy the SAM etc files from the repair folder but this did not help.
11. Tried step 8 again ie another Repair install from the Windows Home Upgrade CD.