So, yesterday I went to download a book online. Being distracted this time I clicked on one of the big (ad) download buttons instead of the real one. Without knowing that, I also clicked the download on Chrome, so that it will open after it's finished. Next thing I know, my computer starts to run really slow and have lots of hiccups. I ran Malwarebytes and removed 98% of the threats. The only remaining one is in the registry, HKCU\Software\Cyber. Manually removed - appears after restart Read the internet, deducted svchost.exe is the problem. Compared it with a clean PC, it was 4KB smaller. I replaced it with the clean one, but the registry still appears. I've ran out of solutions unfortunately.