Recently, my computer has been infected by rogue antivirus program namely
Smart Fortress 2012. It is loaded whenever I boot up my Windows and displays various warning alert to lure users to buy the full version.
Among the effects are:
- slows down my computer
- I'm unable to open task manager
- cannot run any application
- rendering my computer useless
With a bit of Googling and luck, I was able to remove the fake antivirus.

Here's how do I do it: