Regarding the Virus and other nonsense. Download Malwarebytes, install, update and run a deep scan. After that do the same with super antispyware, both are free.
If you are infected you do not need to purchase a new computer. At the worst case you need to format and reinstall Windows because the virus/spyware will not damage your hardware. The monitor dieing is just a coincidence and if it has been flickering for a while that means the backlight finally died (if it is an LCD). Try malwarebytes and take it from there.