IE closes by itself, usafis.org/freelotto.com popups

Hello!

I am at a loss here. I think i got the supposed trojan(s) from some alcohol 120% crack my friend recommended to use. Ever since then I've had IE close itself down at random points, Firefox as well. I used to get popups of Usafis.org and freelotto.com for example with relatively big intervals. Ive tried scanning with Hijackthis but my semi-experienced eye doesnt spot anything that Id dare to delete. Im not sure whats happened but now the popups to those websites have disappeared - instead i get a popup of IE every 5 minutes or so that doesnt really open, its minimized but cant be opened. Just before it appears my computer starts lagging. the website address is something like http://ad.1030252.com/ with some code from there on. Also, my windows explorer seems to have slowed down - every time i open a new folder i notice a second long delay before everything is listed and on the screen.


This is my hackthis log -
C:\WINDOWS\system32\1S67i16K.exe is surely the trojan, the date created and name type imply this. I deleted it after terminating the process but its back again. I am not sure how to remove it from registry or which process it could be tied to but there must be some link.

Please help guys!


Logfile of HijackThis v1.99.1