I have problems with bitcoin miners among other things. I have run Malware Bytes and sometimes it finds 4 instances of miner and sometimes 6. I select quarantine, but the next time I boot up they are back. Also IE11 freezes up quit often, most of the time when it does I open task manager and I find a couple of programs running that are not even named, just icons. I stop them and everything is ok for a while, but they return.