Hi, every time I start my PC I get many errors from windows trying but not beeing able to load a file named qhtiX.exe (X stands for 4 through 31). Each of the numbers is a system error. I haven't been able to find any info on this file and don't know which program is trying to use it.

Thanks

Install Super Antispyware. Run it in safe mode. Allow it to quarantine whatever it finds.
http://www.superantispyware.com/

Run the online scan for Bit Defender in normal mode. Allow it to quarantine whatever it finds.
http://www.bitdefender.com/scan8/ie.html

Post a Hijack This log in the appropriate forum by following the directions in the link below.
http://www.bleepingcomputer.com/forums/topic34773.html

Potentially this is the remainder of a virus you have had. Follow the instructions as layed out by buddy215