The most probable reason you are seeing
All Access To This Device Has Been Revoked warnings is because of an adware infection. These tech-support scams are just trying to trick you, everything they claim is fake, unless the issue is completely unrelated. If you're dealing with adware , the adverts will be pretty intrusive. If you carelessly install freeware, it's not surprising that an adware is installed. No need to worry about the advertisements harming your PC, and unless you dial the provided number, you will be fine. However, if you did call them, you might be cheated out of a lot of money, or more severe malware could be installed, and that may allow them access to your private details. Allowing some suspicious technicians to have remote access to your system might turn out badly, so be cautious. You can be calm that this contamination mentioned in the alert it isn't real, and that your system is safe. If you want the ads to no longer appear, you must eliminate All Access To This Device Has Been Revoked.
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