Hi klauskinky, welcome to DaniWeb :D
Norton should be able to remove that; follow the instructions here:
http://securityresponse.symantec.com/avcenter/venc/data/hacktool.rootkit.html
Move hijackthis into it's own permanent folder (it's now in a Temp folder), so that it, and the backups it will create, will not get deleted during the cleanup process.
After you've moved hijackthis, close any open browser windows, scan with HJT, and post a new log please.
You can also try running a couple of these free online anti-virus/anti-spyware scans and have them clean what they can:
http://www.kaspersky.com/scanforvirus.html
http://housecall.trendmicro.com/
http://us.mcafee.com/root/mfs/default.asp?cid=9914
http://www.ravantivirus.com/scan/
http://www.bitdefender.com/scan/licence.php