I was getting the low disk space message which is where this started, and I did use add/remove to take off programs the DVD making software added to the machine that were never actually used. When trying to defrag' it said a file was missing and told me to go to system set up, and when I went to search for the file the search funstion did not work. Which is why I did the system restore when prompted. The power cut seems to have occured before this was complete, which was all mentioned above, as is the fact that I don't have the original XP disc.
Anything useful to help resolve this situation would be appreciated.