Hello, when I turned on my computer, a lot of all kinds of programs started working non-stop. I started Windows antivirus, it blocked one virus, but it didn’t help, many programs still worked. I downloaded Avast Free Antivirus, but it still doesn’t help. What is wrong…
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Installing Avast after you are infected by viruses is too late for the Avast prevention shields to stop them.
You can run a full virus scan in Avast to see if that can detect and remove them.
I would also try a Malwarebytes manual scan to do the same thing, (but disable the Malwarebytes real-time functions to avoid conflicts between 2 real-time AV’s).