Divxcodecpack.com having malware?

I downloaded a codec pack from “divxcodecpack.com” and from same day my computer is very slow.
CPU usages always shows high in task manger with “CMD” process.
Is scanned my computer but it did not find a virus.
One of my friend told me that I should never download such “divxcodecpack.com” software, it contents viruses and malware.
How to check that this having viruses.

Guess you wanted to be sure you got a reply 'cause you're all over the internet with this!

You got an answer here: http://forums.techarena.in/windows-software/1199041.htm