I am running Windows XP, professional version. When I boot up, I am suddenly getting an error message box stating: "Execution of the specified command has failed". It doesn't tell me what the command is and I have no idea how to stop the message from popping up. System restore has also become unoperational so I can't do it that way. I did a couple of online virus scans and got rid of a couple of viruses that my program didn't catch. Any suggestions?