Ok so last night this thing popped up on me.

Antimalware Doctor found viruses, rah rah, install us

I didn't install or buy or whatever with it. But it keeps popping up whenever I log on to my computer now and it's pissng me off. I need this shit gone. I've google it to bits and so far, all i see are these links to other software and antivirus stuff which I don't at all trust.
I don't want to download anything, I don't want to reformat my computer I just want it gone and off my computer forever. Please help, it would be appreciated x 10000.
Download SuperAntiSpyware or MalwareByte's Anti-Malware and run a scan in Safe Mode. Should sort it out.