Today when you start your task manager, it say that "Task manager is disabled by the administrator"
Now what the hell is this!!
See that it is a virus, that has modified your registry and by that blocked some of your computers services from running, one of the services that the spyware has blocked is Task manager
Now to fix the Registry modification, Do the registry hack here!---
and type regedit
there will open the registry editor
There is a registry hack to enable or disable Windows NT TaskManager. The same registry hack applies to Windows 2000 and Windows XP.
Value: 1=Enablethis key, that is DISABLE TaskManager
Value: 0=Disablethis key, that is Don't Disable, Enable TaskManager
And as I mentioned above, since the policy is Remove Task Manager, by disabling the policy, you are enabling the Task Manager.
Now since the virus has blocked many things, to enable them all you have to delete the Virus, to do so(follow the steps below)
this is an virus attack on you it is called windows.spyware(someting like this)did u have genuine(orignal) Windows installed in your system
this adware /spyware mainly(your copy may be original also) attacks on false copy of windows
u can remove it by Ad Aware software
download it from here
warning : this answers recommends u to use Original windows Software