avast malware - harmful webpage or file blocked

I keep getting messages from avast saying it is blocking a webpage or file. My task manager shows there are a lot of processes running. My computer is acting really slow now, and it started making buzzing noises, and on startup the fan is making an incredible racket as well. Malwarebytes hasn’t found anything. What should I do? I saw other people post, but there were warnings not to repeat these things.

Each warning has three fields, object: infection: and Process:
usually says http;//f0fff0… or fa8072 or maybe go.wymedia

infection is always url mal
and process is generally windows syswow64/dllhost or program files…iexplores/exe

info from malwarebyte scan:

Malware help is done in viruses and worms forum section…
How to recive help instructions is found in sticky post at top in that section

https://forum.avast.com/index.php?topic=163777.0