1. Press F8 to enter safe mode, and then exit. Select restart or shutdown to start, and then you can enter normal mode (repair the registry).
2. If the fault still exists, please use the system that comes with the system to restore it to the state without this fault (or use recovery software to restore the system).
3. 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.
4. If the fault still exists, set the CD-ROM drive in the BIOS and insert it into the original system installation disk as the first boot device, and press the R key to select "Repair Installation".
5. If the fault still exists, it is recommended to reinstall the operating system.
If not, it is recommended to repair the installation, which can not only repair the system, but also keep the programs and files of disk C from being lost.
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.