Hi cs, welcome to DaniWeb! You must not have noticed the announcement at the top of the forum requesting all hijackthis logs be posted in the Security forum. :)
There are some things you should do, however, before posting your log there. First, have a look at this thread:
http://www.daniweb.com/techtalkforums/thread5690.html
I see you have already done several things to try to get rid of this, but there are a few more. You should also have free online scans done from http://www.trendmicro.com/en/home/us/enterprise.htm and
http://www.pandasoftware.com/activescan/com/activescan_principal.htm
If the problem still hasn't been resolved, update hijackthis using either the Update feature within it or from here: http://www.softpedia.com/progDownload/x-Download-5034.html
Also, hijackthis should be in it's own folder to save backups in a centralized location (like c:\hjt\hijackthis.exe)
Close all windows, scan with hjt, save the log and post it in the Security forum, again describing the problem you're still having and the steps you've already taken to try to fix it.