Remove 'Manage' from the My Computer context menu

Paste the following in notepad and save it with a '.reg' extension. Windows Registry Editor Version 5.00 [HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer] "NoManageMyComputerVerb"=dword:00000001

Merge it with the registry.

to undo the change delete the "NoManageMyComputerVerb" key from the registry.