If you think you’re computer has been hacked by a virus, it’s time to run a series of virus scans.  First, run a scan using whatever Internet security software you currently have installed.  (You do have security software installed and updated, right?)  Then run at least a handful of the following free scan software.  They’re all from reputable companies.  There’s no one software that catches all viruses, so that’s why it’s important to run a few.