Avasoft Antivirus Professional is a stuborn malware client that can be very hard to remove.  It will block the install of many antivirus clients and limit the user of the computer.

Once installed it gives constant warnings about the user being infected with viruses.  All these warnings are false and made to trick the user into making a purchase of the program.  This is normal for this kind of malware.

To remove Avasoft Antivirus Professional  you should use this Avasoft Antivirus Professional Removal Tool

If you are looking for a way to manually remove this virus you can check out http://www.pctechguide.com/virus-removal/avasoft-antivirus-professional-removal