After allowing a friend to use my computer, I came back to find it with antivirus pro 2009 on it.
Woohoo!
After finding fixes for it, they all seem to point to using Malwarebyte's anti-malware, but upon launching the installer, nothing happens, the "Loading" cursor pops up for a while then goes away, forcing me to kill the process. I can't open any av programs, except for avg which comes up with an error upon scanning.
Help is greatly appreciated.