right, this isn't down to a virus as i've scanned it recently. But my CMD or COMMAND.COM will not accept commands like Ping or net etc. i'v eattached a pic to show that. i was wondering if it could be something has gone haywire in my registry. it's actually quite anoying because my friend makes batch files that cause flashy screen but anyway back-on-track, if anybody knows how to sort out my cmd then plz let me know. i will be going to school in about 20 mins so i cannot speak for too long.