Multiple Windows Update icons malware(?)

Hello,

Recently I noticed that my computer started to freeze a lot,and I realized that lots of Windows Update icons appeared on my system tray,and when I passed the mouse over them,they disappeared.

After a quick research,I found out that it could be a worm.So I ran a boot scan with Avast.

Then,the problem disappeared,but I ran Malwarebytes just to make sure that everything was fine and it found nothing.However,I still don’t know if my computer is 100% OK.

What should I do to make sure that the problem is solved?

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