Have you rebooted your computer?
Scanned for viruses?
Download and run Malwarebytes for Potentially Unwanted Programs.
Make note of when the issue occurs to further determine what program may be causing the issue
High resource requirements
Poor tech support
Poor stability due to wide range of hardware supported
High overall cost of ownership
Can run most software
Widely available on most machines
Hardware is cheaply purchased
Ease of Use
Support for most hardware
Plug and play