Unable to install any anti-virus
 

Hi, Good day! My problem is that I can't install any anti-virus on a PC... I strongly believe it has many viruses because it slow-ups the unit. Almost all of the anti-virus I run (Avira (http://www.avira.com/en/avira-free-antivirus), Avast (http://www.avast.com/index), KIS...