Restart the machine to enter the safe mode. Before the antivirus is completed, don't do any unnecessary actions except start 360 antivirus. If no virus is detected, use the computer of 360 Security Guard to clean up →→→→ clean up plug-ins → clean up traces → clean up the registry, and then "one-click cleaning" for computer physical examination.

Your computer's slow response is a fake crash, which may be caused by too much garbage, too slow machine speed and too many plug-ins. I suggest you use 360 to optimize the acceleration function to see if there are any programs that don't need to be started in the "startup items". The less the better (but don't cancel if you are not sure), restart when using any program, and don't let the temporarily unused program occupy the startup resources. Cleaning up garbage usually helps to improve the speed of the machine.