With Windows XP, switching themes and other registry options can disable the Help and Support options. You can restore them with this registry hack.
Modify this key:
Path: [HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Session Manager\Environment]
First, delete the key that already exists if its type is: REG_SZ. (If it is not, you have a more serious Explorer issue.). Then, in its place, create a new key of type: Expandable String by right-clicking in the right pane.
Its type will be as follows: REG_EXPAND_SZ. Name it windir as it was before, and make the data %SystemRoot%.
This should solve the problem. I have added the script for the same process below, but I have not had any success with it. The keys in certain folders are not easily changed by script.
NOTE: The type of the key is usually what is changed somehow by Windows, from an expand key to a normal REG_SZ. This simply corrects this mistake.
Questions/Comments: [email protected]
-William. § (marvin_gohan)