i was going to update my original post, but have no idea how to find that post.EDIT: I merged this with your Origial post.
anyway, the instructions as given on this site did not kill my system check infection. by reading through the logs i discovered a
few additional techniques that, added to the original instructions, worked for me.
in short -
1 download and run rkill. this stops the system check process
2 download and run tdsskiller (from kapersky). this found 1 root kit and eliminated it.
3 go to the eset.com and run the online scan. it found a java/trojandownloadagent and two Kryptic.AAEWtrojan variants. it removed them both. these viruses were not found by the malware removal product.
4 i then ran the malware product which also found a bunch of other viruses and killed them.
5 i then re-ran the entire procedure and rebooted.
6 i had to use the unhide.exe program to make all the files visible again.
what a pain. this took the better part of 48 hours to research and finally fix. thankfully it is working for now, if there are some other cleanup steps that i should be doing, please, please let me know when you can.
it looks to me like System Check is being somehow bundled w this Kryptic trojan, which replicates itself and then somehow recreates the System Check. at least that is my non-technical hypothesis.
Edited by boopme, 09 February 2012 - 11:31 PM.