[Blocking potentially malicious website]

Hi, I apologise if I have started a new topic where I shouldn't have or if I have posted in the wrong place. I am not really great at this whole forum thing!

Recently I had a few problems with video playback on my laptop, I was having lots of buffering problems and scratchy sound, the laptop is pretty new so I figured it might be infected because age or general wear and tear couldn't explain this away. Anyway, I ran a full system scan with Malwarebytes, this picked up four infections, all with the same name (I can't remember now what it was) but they were removed and I've scanned since and it all seems to be cleared up. Only, now I am getting a notification all the time :

Malwarbytes successfully blocked access to a potentially malicious website: 213.186.33.87 Type:Outgoing Port:57379 Process:Chrome.exe

I am getting this regularly, it appears to be when I log into Facebook, which is a site I would have not expected it on.

I am not the biggest computer whizz as I'm sure is already apparent and I am hoping someone here might be able to shed some light on this for me! Any help would be greatly appreciated!

Thanks

Rosie