Thanks again Exile360. I have copied, pasted and run this line. When I did so igot the mesage "The file 'sr.sys' on WINDOWS XP Home Edition Service Pack 3 CD is needed. Type the path where the file is located and then click ok" The automatic system was looking in folder C:\WINDOWS\Inf\i386. This file copy didn't work when I clicked OK with that path. I found the i386 folder in my WINDOWS directory and used that instead. I then got a number of processing messages, each of which wa salong the lines of "Source C:\WINDOWS\i386\sr.sy_ Target C:\WINDOWS\System32\drivers\sr.sys The target file exists and is newer than the source. Overwrite newer file? I got similar messages with srclient.dl_, srsvc.dl_, srrstr.dl_ and rstrui.ex_. In each case I elected not to overwrite the target because I didn't know what might happen. When I rebooted the system I checked the services monitor and discovered that system restore has now started. However, I cannot access it. When I click on ...system tools\system restore nothing happens. I got a couple of error messages when I rebooted: "rundll32.exe - this application failed to start because framedyn.dll was not found. Reinstalling the application may fix this problem." and "error loading srclient.dll; the specified module could not be found." Any further help would be much appreciated. Best wishes tholland