Blaster has been detected since at least 2004 and any up to date operating system should actually be immune to it, but I feel it's a red herring for a fake antimalware pest.
See this rather colourful thread as it's very similar, it may help: https://community.mcafee.com/thread/32808
Where it mentions Stinger I would substitute 'Fake Alert Stinger': http://www.mcafee.com/us/downloads/free-tools/fake-alert-stinger.aspx
This is an annoying virus, I encountered similar problem w32 blaster worm did not allow me to run any Programs besides infecting task manager. I just killed the defender.exe file first. Defender.ex is this rogue's exe file.
I used the guide
Remove by moderator as it links elsewhere
I think it is solved by now, thanks.