Nowadays the Internet is loaded with several fake antivirus programs and rogue applications which are available for download. If installed, these programs pose a security risk to the users and it was the toughest to remove.
If you are experiencing trouble removing fake programs like AntiMalwareGuard, VirusRemover2008, AdvancedCleaner, DoctorAntivirus, etc (full details here) you can download and use a standalone Rogue AV Cleaner from ESET

Note that, before removing any infected files from your PC, do the followings: disable system restore point, run a full system scan with a good antivirus programs and use the tool mentioned above.
Download Rogue AV Cleaner