How can I get rid of powershell.exe virus? I have the 2020 AVG ultimate installed

Greetings,

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My computer gives me a blue powershell.exe (not responding) screen after booted up. I have the AVG Ultimate 2020 properly installed with 100% tune up with maintenance and antivirus run. The blue screen can be eventually deleted but comes out again after the next reboot or restart.
Greetings,

We're glad to look into this & help you.
For better clarity, share us the screenshot of the message that you receive at startup.