SYSTEM process consuming too much memory

I was on internet, and i received a message from avast day 15/11 saying the connection with coinhive.com was aborted, cause it was infected with JS:miner-C[tr][td] infection. After that moment, my pc got really slow, when i saw the processes on task manager it shows system taking A LOT of ram of my pc. Every other app i start to run also keeps consuming a lot of ram. Even my internet is kind like ´´slowed´´ with all this stuff happening. Ive searched solutons on internet using command regedit e installed and used adwcleaner without any sucess. When i try to scan system32 my avast simply ignores this action and just consumes my memory, like it was scanning, but not showing any progress or results. Please help people![/td][/tr]

Attach your basic diagnostic logs. (MBAM and FRST)
Instructions: https://forum.avast.com/index.php?topic=194892

malware bytes found 13 treads, they got deleted. im posting the texts ty for help.