It seems these are Trojans. Most "normal" virus checkers have difficulties handling those.
You might want to try "HijackThis" first, and then run a thorough scan with "Malwarebytes mba" (freeware version). It takes time (and nerves) but these two applications finally did the job when my PC got severely infected two months ago, despite a good anti-virus checker.
HighjackThis will "only" create a log file of a deep scan which you can then upload and have analyzed automatically. Google "HighjackThis" for download sources. Go to
HijackThis Logfileauswertung for the log file check.
MBAM will attempt to get rid of the malware.
Malwarebytes
Finally, try to recall suspicious web sites where you might have caught the viruses, and avoid those in the future.