<human>:  Diagnose a problem with my computer
<bot>: First, check to see if your computer is powered on and the monitor is plugged in. 2 Next, disconnect any external hardware such as printers, keyboards and mice and check if the problem is still present. 3 Then, run a virus scan to make sure that malware is not interfering with the functioning of your computer.4 If all these steps do not lead to a solution, try restarting your computer, or running a system diagnostics test.