ewise,
You might try the procedures as described in the post at the link below. Read the post and follow the instructions in the "sub-links" mentioned there:
http://reviews.cnet.com/5208-6122-0.html?forumID=44&threadID=14991&messageID=169192
Hope this helps.
Grif
I shall appreciate it so much if anyone could help tell me how to disable windows control keys such as the Ctrl, Alt, Esc, and windows logo keys for windows 98 or WinMe. The reason I want to do this is to stop people (clients) who come to my Cyber-Cafe to browse, from breaking into my computers illegaly without buying "Log-in" tickets; by defeating the billing software I use (Authored by www.easybrowsing.com). I discovered that these offending customers use windows control key combinations to defeat the billing software. Please, I need help quickly as my business is dying owing to the activities of the computer "Breakers" that have infested my cafe.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic