Usually this caused by a virus or your administrator disabled access to it. Symptoms: [*] A grayed out task manager when right click at [url=http://en.wikipedia.org/wiki/Taskbar]Systray[/url] clock [*] If you run taskmgr.exe directly via “Start Menu >> Run” or command line it will give you the following message: Task manager has been disabled by the administrator Fix: [*] Start Menu >…