Hi there, Paulegt. It seems The Stig was able to help quite a bit. At this point I'm going to suggest that you download Spybot Search And Destroy from here: http://www.safer-networking.org/en/spybotsd/index.html
after download you will need to right click the Spybot icon and click "Run As Administrator" - this is due to the fact that the updates and many common viruses detected by Spybot generally require advanced elevation. Right now we aren't going to focus on the Immunization feature until you're clean. Once the program is open: click Search for Updates button, you will then be asked where you want to download the updates from. I live in the USA, if you do as well click any that says (USA) EG. Securitywonksnet1 (USA), the option will then be highlighted.
Click the "Continue" button with the arrow pointing to the right side and download any updates that are automatically checked. You can then exit the update screen and proceed to click the icon with binoculars reading "Check for problems", the scan will then begin, you may be prompted as to whether you want to remove temporary files to speed up the scan.
My suggestion would be to click yes and allow the scan to run. Remove anything in red that seems dangerous. EG. Trojans, Hijackers, etc. anything that is a PUP (potentially unwanted program) you will generally want to wait until a more advanced malware removal folk can take care of that, remove anything that is seemingly dangerous.
If you have any questions as to whether you should remove something, you can post a screenshot here and I will either answer telling you to wait for the malware removal team if it looks strange or say yes/no if it's something you clearly shouldn't be touching. Do know that Spybot has a recovery feature, so if you remove anything that wasn't dangerous you can always purge it from your system or recover it back into your system at a later date.
Let me know how that went, best of luck to you.
Edited by boopme, 24 April 2011 - 06:03 PM.
Edit for readability