Link to remove

http://www.2-spyware.com/remove-winpc-antivirus.html

or

WinPC Antivirus manual removal:
Kill processes:
winav.exe

Delete registry values:
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

Delete files:
winav.exe WinPC Antivirus.LNK