No need to get another/new CD, don't bother.
Yes, always do a "cold boot" (Shutdown, turn off compy power for a full minute, boot it back up) before panicking/posting when that sort of thing happens.
Also, next time please post in your first post what Windows (or other?!?) OS you're using, to save us having to ask.
Also, please to not make multiple posts in a row: Use the "Modify" button to add to the end of an immediately-last post, and start the addition with something like *edit* so we know there was stuff added after the initial post.
GL, and I'm glad you got things worked out.
P.S. If your AV software found something when you restarted, I'd suggest that you shut down all your running programs and rerun the AV scan while doing NOTHING ELSE on the computer until it finishes that scan....
You should always keep scanning until a scan comes up completely clean.
