After a short research I found out that Antispyware master virus is the second most sought-after malware name on the web, which clearly indicates how many people have already fallen for this scam extortion.
As many other rogue security software programs these days, antispyware master penetrates into the system using a trojan, which bypasses common antivirus protection (like McAfee, Norton, AVG, etc). I mean, it's smart.
Moreover, anti spyware master generates random filenames, and that's why removal guides given on forums confuse users because they search for filenames that are nowhere tobe found in their systems.
An intelligent, yet time consuming way to complete the antispyware master removal is to get a nice little app called HiJackThis. It creates a log of current processes running in the system, started programs, their paths and registry keys. For advanced PC users, that's a big help. They can read that info and advise concrete steps to wipe out the malware.
I've helped several people with antispyware master removal, and can conclude that it takes a lot of time and patience to clean the system and repair the damage caused by this scam.
Regretfully, not always people ask for help before buying this rogue program, and when they find out their credit card has been charged $115, it's about too late to begin antispyware master removal.