Hi Niko,
If you haven't already, please get Spybot S&D to clear out most of the spyware.
Short tutorial and download link here:
http://www.tomcoyote.org/hjt/
and download 'Hijack This!'.
Unzip, double-click HijackThis.exe, and hit "Scan".
When the scan is finished, the "Scan" button will change into a "Save Log" button.
Press that, save the log somewhere, load it in Notepad, and copy its contents here.
Most of what it lists will be harmless or even required, so do NOT fix anything yet.
Someone here will be happy to help you analyze the results.