I'm not quite sure how computer savvy you are, so...
To get into safe mode, tap F6 repeatedly as soon as you turn on your computer (preferably immediately after the POST). Select 'safe mode' from the options listed.
Once you're in safemode, download both rkill
Run rkill first to terminate any infectious processes (safe mode isn't so safe anymore) and then start a full system scan with malwarebytes.
That should take care of your infection. Cheers and good luck!