Hi there,
Have you tired updating to 21H1 update and see if that is helpful. You can check the release information for 20H2 update here https://learn.microsoft.com/en-us/windows/whats-new/whats-new-windows-10-version-20h2,
You have also stated that camera is not working , so it seems that their is a driver conflicts with the PC. I advice you to update all drivers from the PC manufacturer website and then try the 21H1 update.
Hope this Answers all your queries , if not please do repost back .
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