I have just replaced my motherboard with an identicle used motherboard. All is working but my virus checker keeps detecting viruses every 5 mins or so it never happened before. Is it just coincidence or could it have anything to do with the new board. Sorry if it's a stupid question
it doesn't have to do with the board that can't take viruses with it
what AV are you using?
you really should try Microsoft Security essentials
Boot into safe mode with networking. Download, install, and update malwarebytes. Then do a full system scan. It's one of the best malware scanners. http://www.malwarebytes.org/