Hi,
Welcome to Microsoft Community.
As you mentioned, the current information can not determine whether the problem is hardware or software, let's first check the problem you have encountered:
First, please try a clean boot by following the links below to see if these issues persist after checking all third party software/services.
How to perform a clean boot in Windows - Microsoft Support
Disclaimer: A “clean boot” starts Windows with a minimal set of drivers and startup programs. It helps to determine whether a background service is interfering with your game or program and to isolate the cause of a problem. These steps of "clean boot" might look complicated at first glance. However, to avoid any trouble for you, please follow them in order and step-by step so that it will help you get back on track. Second, please try replacing a mouse (if possible) and see if part of the problem is related to the mouse (clicking problem).
Then, I'd like to confirm with you whether these problems appear suddenly or after a certain period of time. We need to check whether a certain update caused the problem.
Finally, create a local administrator account and log in to your desktop using the new account to see if the change account profile works.
How to create a new Microsoft account - Microsoft Support
* Since the specific cause of the problem you encountered has not been confirmed, our initial operations are biased to troubleshoot the problem.
If you have any questions or need to add content, feel free to leave us a message.
Thank you for your patience and understanding!
Sincerely
Manson | Microsoft Support Specialist