Trawling through the internet in response to this brings up many many programs that can be affeceted by the Volume Shadow Copy Service Error.
I whole lot if them are driver based.
I am assuming you have XP.
Can you check your event log and post what it says?
Got to Start-> Control Panel ->Perfarmance and Maintenance ->Administrative tools ->Event Viewer.
There will be some different events Applications, Security and System.
Check them all, if you see a Warning (yellow ! triangel), click on it.
It will open a new window and on the window will be a copy icon (two sheets of paper) click that and paste it here.
for instance I have
Event Type: Warning
Event Source: W32Time
Event Category: None
Event ID: 36
The time service has not been able to synchronize the system time for 49152 seconds because none of the time providers has been able to provide a usable time stamp. The system clock is unsynchronized.
For more information, see Help and Support Center at click here.