Okay I finally managed to fix it by going to (Thanks to JacksonYarr)
<Drive>:\Users\<Username> \AppData\Local\GameMaker8.1\ extensions
and deleting all the extensions in the folder, then reinstalling.
Boggles my mind why an error like this would happen but at least there is a fix for it.
Edit: Realized I could have just edited my last post, oops.
Edited by Spyker, 16 May 2012 - 08:49 PM.
Check out Night Bike for Android and iOS!
Curious on how to code in other languages? I highly recommend you check out Team Tree house. You'll learn a lot of skills and methods that will help with GameMaker, and you can learn how to code things to work with your game (websites, databases, etc). There are tons of small courses that range from beginner to advanced.