0x0000C1F5
Workaround for STOP 0x0000C1F5 / 0xC1F5 / C1F5 / BSOD / CLFS.SYS / KB946084
I found the solution here at Delmartian Technologies.
The fix is too boot off a Windows 7 DVD and then restart PC when get to Install Windows screen turn off computer.
http://www.delmartian.com/nullpointers/STOP-0x0000C1F5-0xC1F5-C1F5-Revisited.html
Microsoft must have read Delmartian Technologies fix and made their own version here:-
http://support.microsoft.com/kb/970101
Microsoft Says
To resolve this issue the corrupted file needs to be repaired. This can be accomplished by booting to an installation disk that has the ability to self heal this type of issue. This can be done with a Windows 7 Beta installation disk. To recover a Windows Vista volume with Stop Error 0x0000C1F5 without data loss, perform the following steps:
1. Obtain a Windows 7 Beta or later Windows 7 installation disk
2. Insert the disk into the disk drive and boot from this Windows 7 Beta installation disk
Note: Once booted, cancel out the Windows7 setup. Do not install Windows 7.
3. Once the system has booted successfully, remove the Windows 7 Beta installation disk and reboot the computer from the hard drive.
Note: The Windows 7 Beta installation disk includes self-healing code that resets the corrupted $TxF RM log file, therefore the problematic volume should be recovered by simply booting from the Windows 7 Beta installation disk.