Found & Deleted > tr/crypt.xpack.gen but now system is super slow.

Hello, I use Avira Internet Security 2012, yesterday when I was doing a daily scan I found this trojan tr/crypt.xpack.gen, Avira quarantined it. I restarted my system and it took ages to restart, I uninstalled Avira and downloaded Bitdefender Total Security 2013 (Trial) and scanned my system with it and it didnt find anything, even Malwarebytes didnt find anything, but still my system is all...