Pw.exe is the main file of each program from malware family, that includes the following programs: XP Antispyware 2011, Vista Antispyware 2011, Win 7 Antispyware 2011, XP Security 2011, Vista Security 2011, Win 7 Security 2011, XP Internet Security 2011, Vista Internet Security 2011, Win 7 Internet Security 2011, XP Antimalware 2011, Vista Antimalware 2011,