I get no other errors from WinRescue. The strange thing is that this message (The following files could not be copied: SOFTWARE key) just started in the last 6 or 7 days. I hadn't installed any new software, nor uninstalled any, nor did any MS updates. Nothing at all.
I had the thought to try running WinRescue in SAFE MODE to save the registry files which I normally save. Although I got a warning that it is not recommended that backups be done in Safe Mode, it worked just fine.
Any other thoughts. I have looked at the Task Manager and do not see anything unusual running there. My antivirus (Norton 2006) is up to date and runs every week without any malware found. I also run a number of spyware-checking programs and all is well.