I’ve downloaded an obviously malicious file with a virus attached, but it was not caught by either avast or malwarebytes. When I restarted the computer it went through the start up and then goes to black screen, with nothing visible. I have started in safe mode but when I run malwarebytes the computer shuts off after about 5 seconds of the scan commencing. Avast itself will not run because it says there are no start or finish points.
Any suggestions please, and I’m not overly tech savy.