Download FxAgentB.exe from click here and save it to your desktop. After downloading, double-click the FxAgentB file to run it and the program will scan your entire hard drive - this may take a while. When it is done, it will generate a log file called FxAgentB.log - save that information as you may need to paste it here later. Restart your machine when done.
Next click click here to download CWShredder by Merijn Bellekom and run it, hit 'fix' as opposed to 'scan only'.
Finally, update Ad-aware and run a scan.