Let's start at the beginning. This is the only way we know that #1 these things ARE on the computer, and #2, we have gotten them all removed.
There ARE entries in your log indicating some nasty items. There are ways to remove all, but steps must be followed correctly, and in order so begin here;
READ ME Before Posting A Request For Assistance!
Follow each step, IN ORDER. Once you have completed all steps, including running all the programs specified in SAFE MODE and having each program fix everything it finds, plus saving any logs noted including running and fixing with Spysweeper and and saving that entire log. Then reboot to normal mode, run a NEW HJT scan and save that log also.
Then post back here with ALL logs and we will see where we stand.
P.S.
Your log shows evidence of both AVG, which I assume is your current Anti-virus program and at least some remainders of Norton Anti-virus indicated by these entries;
O2 - BHO: NAV Helper - {BDF3E430-B101-42AD-A544-FADC6B084872} - C:\Programme\Norton AntiVirus\NavShExt.dll
O3 - Toolbar: Norton AntiVirus - {42CDD1BF-3FFB-4238-8AD1-7859DF00B1D6} - C:\Programme\Norton AntiVirus\NavShExt.dll
Please do a search for all folders and files named Norton and also Symantec and delete all that you find.
There were also three instances of Internet Explorer running when you did your HiJackThis scan. Please be certain that all unnecessary programs, spysweeper, prevx, Motherboard Monitor, zBrowser Launcher, Skype and ALL browsers are closed when you run your next HJT scan.
Also, HiJackThis must be run from it's OWN folder so please be sure you locate it in it's own folder which you create.
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