How is the operation recently? Try to uninstall all the software, patches and drivers downloaded before the accident, and see the following methods. If the fault still exists, it is recommended to kill the Trojan horse first and try to repair the system.

It is recommended that you download windows Cleanup Assistant to kill malware and Trojans (search and download):

Download 360 system first aid kit scanning system

1. Please use the system that comes with the system to recover until there is no such fault (or use recovery software to recover the system. If you cannot enter the system, press F8 to enter the safe mode to restore the system).

2. If the fault remains, use the system disk to repair it, open the command prompt and enter SFC/SCANNOW(SFC and/) to insert it into the original system disk repair system, and the system will automatically compare and repair it.

3. If the fault still exists, set the optical drive in the BIOS as the first boot device, insert the original system installation disk, and press the R key to select "Repair Installation".

4. If the fault still exists, it is recommended to reinstall the operating system.

Use the system restore method that comes with the system:

System Restore: Start/Programs/Accessories/System Tools/System Restore, click Restore my computer to an earlier time, and then click Next. You will see that the date page has a dark date, which is the restore point. After it is selected, click Next to restore the system (Win7), and then select the device and security sub-options in the control panel.

In terms of hardware, test whether your CPU temperature is too high. Is there anything wrong with the hard disk and other hardware?