Check if your Windows 10 PC is eligible to upgrade for free to Windows 11. You will get new in-product notifications to tell you about Windows 10 end of support and how you can take actions to prepare for the move to Windows 11.
It could be software issue and hardware issue. Software issues are outdated drivers, faulty updates, or incorrect power settings. Update your driver using Advanced driver updater and also check faulty power supply.
There seems to be an issue with replacing. Before contacting the person, check for dirt on the screen, remove any screen protectors, restart your phone, and try activating safe mode.