check your registry for the following and delete:
HKEY_CURRENT_USER\Software\WinPC Antivirus
HKEY_CURRENT_USER\Control Panel\don't load "scui.cpl"
HKEY_CURRENT_USER\Control Panel\don't load "wscui.cpl"
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\ Run "sysav"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Security Center "AntiVirusDisableNotify" => 1
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Security Center "FirewallDisableNotify" => 1
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Security Center "UpdatesDisableNotify" => 1
Make sure <winav.exe WinPC Antivirus.LNK > does not exist by doing a search in C: