Windows XP doesn't have a "GUI" method for disabling archive searches when using the search dialog. To put an end to this simply open on the command prompt and type:
regsvr32 c:\windows\system32\zipfldr.dll /u
To re-enable this option repeat the process and leave off the '/u' switch.
You should get a message after either operation saying the DLL was successfully registered or unregistered depending on the command you used.
