from viruses n other msc programs,but the problem was still there...sigh..
1.right clik option didn't pop up when I right click on the taskbar
2.I cant even see the user setting icon on the control panel
3.log off option in start menu dissapear
4.No user selection even in safe mode > usually there will be 2 account to log in right, addministor and default user
5.Many option to setting windows has been disabled
p/s im able to run task manager,regedit and other utilites programs provided by the windows & i made some changed at registry key value to re-enable all the option above,but automatically the registry value that i changed reset back to its previous state.Oh,no error message during startup.all ok
thanks in advanced..