Moved to Malware Dicsussion for better attention. Once it's cleaned I would change any passwords for banking sites just in case. Also see this thread for some hints: https://community.mcafee.com/thread/45042
See the last link in my signature below and run both Stinger and Malwarebytes Free, keep the latter free by not accepting the trial offer.
If you use Java in your browser(s) make sure that only one Java engine is installed in your programme list in Control Panel, and that it is the latest one.
Likewise make sure all other software is up to date along with your operating system. Also keep Internet Explorer totally up to date even if you don't use it as many programmes do.
Thanks a lot! Your explanations were clear and I checked: my computer is ok.
That's great. Good luck ;-)