Why is my Win 7 mission manager already killing the virus?

The use of the Task Manager in our computer is needless to say, as long as a little understanding of the computer knows its usefulness is very large, but if the task manager can not open how to do?

1

Why Task Manager is not open

If you don't move your computer, it should be poisoned or a trojan, and if someone has used your computer, it may be that the registry or Group Policy has been modified. This article is about how to do if the registry is modified.

2

Enter Registry Editor,

Click Start and enter regedit in the search box.

3

Then navigate to:

Hkey_current_usersoftwaremicrosoftwindowscurrentversionpolicies

4

Finally, under the registry key, an item named System is created under which the "string value" or "DWORD value" named DisableTaskMgr is set, and setting the key value to 0 unlocks the Task Manager's forbidden State, and setting it to 1 represents a prohibition

The above is about why my Win 7 Task manager has already killed the virus, and the next one we want to say is "Group Policy has been modified to prevent access to the Task Manager", how to change back.