dvd-rom, cdrw not recognized

i386 folder from the CD The size is: 460MB Size on disk: 475MB i386 folder on sick PC size: 1.27GB size on disk: 1.29GB

The "size on disk" 460mb and "size on CD" 475mb <—- is right The size on "sick" machine i386 folder on sick PC size: 1.27GB <—– not correct for i386 size on disk: 1.29GB <—– Not correct for i386 What "disk" are you using that shows an i386 Folder size of 1.29GB?

The 1.27GB/1.29GB folder is the one that was already on the machine (on the HDD).

OK. Then it's probably correct and I am out-to-lunch, or have just learned something new. Could be that all the critical updates and patches have also been saved in that location, though I had thought that they usually saved in C:\windows\dllcache (note: I just booted up a Dell laptop WinXP Pro and the i386 Folder is very close to your 1.29gb) So, using that i386 Folder in the performance of SFC, we need to be sure that Registry is pointing the SFC utility to the correct location.

The following Registry keys are pointing to C:\ HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Setup\SourcePath HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Setup\ServicePackSourcePath HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\SourcePath probably of no relevance, but the following keys are not present: HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows NT\Windows File Protection HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\SFCShowProgress

ran SFC again, got the same error messages requesting "XP Professional CD2". Tried "Retry", but to no avail. Error message appeared 5 times.

The solution was to delete UpperFilters and LowerFilters from the following registry key:
HKEY_LOCAL_MACHINE>SYSTEM>CurrentControlSet>Control>Class>{4D36E965-E325-11CE-BFC1-08002BE10318}

the caution being to *only* delete those values and not the .bak values that have the same prefix.

Reboot, and Windows recognizes the drives again.

reference article is located at: http://support.microsoft.com/kb/314060/en-us


Thank you for your help though. It was very kind of you to help me attempt to figure this out.

Good work. Thank you for helping the rest of us by sharing your solution. Best Regards,