So nvidia not only in mining also messed up with driver even in gaming. My laptop was running very smooth until i updated latest driver. laptop started very slow and game loads very long time. i used driver which was realesed in october 2020. I installed that driver back and laptop runs fast like used to be.
Might be a problem on the installation too, maybe start with a clean install. NVIDIA has this mining limitation since a few months ago, so you should expect frequent fuck ups with their drivers. That being said, this anti-mining driver is gimmick at best since it only limits one or two algorithm and it's easy to bypass, as long as you accept the risk of breaking your card/warranty.