When Windows 10,11 was first released, Microsoft allowed users of Windows 7 or Windows 8.1 to upgrade to Windows 10 for free. Microsoft officially ended the free upgrade offer in December 2017, but a method still works that allows you to upgrade an older version of Windows to Windows 10 for free.
Non-Responsive Keys: If certain keys on the keyboard are unresponsive or do not register when pressed, it could be due to dirt, debris, or a faulty connection. Cleaning the keyboard or checking and reseating the keyboard cable may resolve the issue.
Sticky or Stuck Keys: When keys feel sticky or get stuck when pressed, it is often caused by spilled liquids or debris lodged beneath the keys. Cleaning the affected keys and the surrounding area can improve functionality.