I think you have disabled the real time protection of three antivirus otherwise I can not explain how it can work on your PC.
In this case using a single antivirus and uninstall others and use Malwarebytes, Emsisoft Emergency Kit and ADwcleaner in on-demand scan.
Ccleanner or PrivaZer are a good choice for privacy and cleaning of unnecessary files.
A backup plan is very important for the security of data and the OS: Windows Backup Tool or Paragon B & R free or Aomei OneKey free allow you to create a system image on a partition or an external HDD to be restored when needed.