Hi, I know the default answer is "re-install", but is it possible to restore "Volume Shadow Copy" (VSS) and "MS Software Shadow Copy Provider" otherwise? I have an old partition in which both work. I can copy files from that system and/or its registry. I have been able to restore "Volume Shadow Copy" (VSS) by copying all VSS* files from C:\Windows\System32\ and copying the HKLM\SYSTEM\CurrentControlSet\Service\VSS entries. The service is listed again and can be started. I tried to do the same for "MS Software Shadow Copy Provider" by copying swprv.dll from C:\Windows\System32\ and HKLM\SYSTEM\CurrentControlSet\Service\SwPrv entries (dllhost.exe was already present). The service is listed, but cannot be started. Then I copied the HKLM\SOFTWARE\Microsoft\COM3 entries. The progress bar for starting SwPrv now went to 50% instead of 25%, but the service still does not start. I would like to restore this on my father's PC. Since I do only occasionaly visit my parents and for a short time, I don't have the time for a re-install (which will take several days due to his particular setup). I need the services (realize that now, painful lesson) for backing up his system partion using SyncBack. More information from the makers: http://www.2brightsparks.com/bb/viewtopic.php?t=932&