When I try to run "sfc /scannow" on my Windows XP Pro system it starts to run (I see the flood bar) but when it gets about an 1/8th of the way through it asks for the Windows XP install CD (which is already in the CD Drive, and I hear the CD drive whirling away for little awhile).
The error message is "Files that are required for Windows to run properly must be copied to the DLL cache." "Insert your Windows XP Professional CD-ROM now." I can select Retry, More Information, or Cancel. Retrying just brings me back to the same error dialog.
The XP install CD in the drive is the one I used to installed Windows XP and I know that the CD ROM and drive work fine. I should add that the install CD is an upgrade version and not a full version.
Anyone have this happen to them or can suggest why it isn't working?
Also, I have been unable to convince myself that running sfc /scannow will not overwrite newer systems files with old ones from the original install CD. I know in Windows 2000 it would overwrite the newer system files and often result in a unstable system. Can anyone shed some definitive light on this?
Just to be sure I have also reinstalled SP1 and it still doesn't work.