Dem pesky viruses.... >:U Sorry to heard your PC may have contracted one. Viruses can latch on through anything from the internet, even just going onto a webpage can infect your PC though JavaScript. (The program your PC uses to go on the internet and read the webpage. Viruses are usually self-replicating programs that make unauthorized changes to your PC. They can be small and just make your PC slow, or they can do many other things, including hack into orher accounts, slowly delete all stored memory from your PC, or even take screenshots of whatever you're doing. But don't fret, some you can get rid of quite simply. (But not all the time sadly .-.)
It's good you're downloaded MalwareBytes. I would have told you to do exactly that. It is one of the best FREE anti-virus programs out there. I used it before I got my Trend Mirco Titanium (Which is around 100 USD). May I ask, do you know the names of the viruses it said it found? Some viruses aren't fully deleted by that sometimes. Some can even be triggered by opening a file randomly.
Next, I'd try and set all of your internet security settings as high as they can go. Yes, this may seem pointless, but it really isn't it protects you from bad sites and bad downloads.
Next, get all your important files such as pictures and videos on a USB. Nothing like .exes or things like that though.
Next, go to your task manager, I'm not sure how it's found on your PC but a few you right click the bottom left hand corner, and see what programs are running currently and in the background. Most viruses will show up there, that is, unless they are bulit not to. If there is something that you've never seen running, please tell me the name of it. Again, knowing it's name will be very helpful. Also, you could try ending the process. (I'm not to sure how this will effect your PC)
Also, I'm not sure if your PC has this, but if it shows the location of the program in the Task manager, please say. It will most likely to be in your C: drive.
Next, you should try scanning again. If it finds anything else, delete it immedatly.
If all of this fails, I'm afraid you may have to see a local PC specialist. :c Some can't be deleted with normal equipment.
Also, the post above may also help. PC system restore can sometimes help with this. :
(Excuse meh 485847374 typos. I can't typr with a phone. |D)
^ My gawd dat irony