Explorer's menus can get messy at times. But you can use a Registry hack to clean it up a bit by removing some items from the Tools menu. Map Network Drive, Disconnect Network
Drive etc can be stopped from displaying. Run the Registry Editor and go to:
Create the following DWORD entry and set the values correspondingly.
If the values are already there, then just check the values:
Restart your computer and see the explorer window with changes. Happy??
"Windows XP Tips: Remove Menu Items from Explorer "
Reference : techpraveen.com