1) System poisoning: use anti-virus software first (Rising/Card is recommended). It is strongly recommended to download a 360 security guard to clean up and delete some malicious plug-ins and rogue software downloaded from IE or the system.

2) Too many running programs: shut down some unnecessary programs and services (start-run-enter msconfig- start all programs except ctfmon and antivirus software).

3) cclean: download the optimization master optimization system, cclean.

It's best not to put too many things on the system disk C. You can move some programs and files except WINDOWS components to other disks.

Clean and defragment the disk:

Click My Computer-Right-click Properties-Disk Cleanup-Tools-Defragmentation.

2 hardware,

1) CPU: CPU temperature is too high. Open the case to check whether the CPU fan is not strong enough. If so, clean the dust on the fan, lubricate the fan or replace it with a more powerful fan. Generally, the high CPU temperature is caused by the fan.

2) Power supply: Check the fan of the power supply, and touch the power supply by hand to see if it is overheated. If it is overheated, check the heat dissipation in the cabinet, clean the dust in the cabinet with a brush and a hair dryer, and check whether the wind power of the power supply fan is too weak or not smooth. Lubricate the fan or replace it with a stronger fan.

In addition, don't plug some high-power appliances into the power plug, which will lead to unstable computer voltage, frequent crashes or power outages.

3) Memory: Unplug the memory and insert it with an eraser and a golden finger. It is best to clean the memory stick with a brush and a hair dryer. Pay attention to the heat dissipation of memory. Don't let your memory overheat.

The easiest way to check the quality of hardware: you can try the hardware on other good machines.

I hope it helps you.