dawn it... kaspesky antivirus f**ked my computer a bit... i tried to uninstall it, and install internet security, but it can't be deleted!!

I tried everything, i deleted it from registry, using Tuneup utilities... but in security center it still say that kaspersky antivirus is still there....
i don't know what to do...
I installed ESET smart security, and it works perfect... only thing is, that security center now reports that i have two antiviruses...
shit....