This is caused by a cache error. Please use the following software to repair (download 360 Guardian, select computer clinic/system icon/icon to display abnormal repair; If there is an error in the disk icon, select the local disk icon for abnormal repair; If it fails, restore the system or reinstall).

1) is fixed by software. It is recommended to try to use the computer clinic/system icon/icon in 360 Guardian to display abnormal repair. If the disk icon is wrong, select the local disk icon for abnormal repair (Win optimizer and Rubik's Cube Windows optimizer also have similar options, please search and download if necessary).

2) If the fault still exists, try to restore the system or reinstall the system.

If you change the theme and uninstall the installed theme, is the problem caused by your operation?

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 click Next. You will see a dark date on the date page, which is the restore point. After selecting, click Next to restore the system (Win7), right-click the computer and select Properties on the right.