Hi,
Click Start, Type msconfig in Run
In system configuration dialog box, uncheck sysmenu.dll under Boot Tab if this boot option exists.
And check if there are related keys about sysmenu.dll under
HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrentVersionRun
HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindowsCurrentVersionRun
If there are, please try to delete them.