raviHCL

my system is affected with some virus it basically has 2 problems:- Problem1: registry HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\SMDEn has some problem due to which whenevr i try to download some antivirus/anrispyware system is restarted automatically and i m not able 2 download anything. Problem2: sites pop-up automatically on mozilla as well as IE 7.0 i am in utter disarray please help me.... Thanks a ton