[Troy]

to remove spycatcher:
Tenebril Support - How do I uninstall SpyCatcher?

pncrt.dll error:
Error Message: A Required .DLL File, PNCRT.DLL, Was Not Found

you should run adaware and spybot on it:
The home of Spybot-S&D!
Ad-Aware 2007 Free - Lavasoft
Ad-Aware 2007 - Reviews and free Ad-Aware 2007 downloads at Download.com

kak.hta problem:
Wscript.KAKWorm or VBS_KAKWorm - Virus Removal Instructions - Kagou-Anti-Kro$oft

see if you have any viruses:
Kaspersky Online Scanner

get some decent antivirus software:
AVG Free Advisor - Installation files & documentation

also, sounds like a fan is going bad, and overheating your computer?

let us know how it goes...