This is a problem with the disk. Please repair it (each disk has been repaired, or only one drive letter C is displayed). \r\n \ r \ The system's own disk repair method: \ r \ nThe specific steps are as follows: select the middle drive letter in My Computer, right-click Properties, and select Tools → Start Check and Automatically Repair File System Errors and Scan and Recover Bad Sectors in the pop-up Drive Properties window. \ r \ n \ r \ Hard disk damage will cause the computer system files to be damaged or lost, and the computer will not start or crash. Hard disk bad track can be repaired by NDD disk tool or disk scan. \ r \ n \ r \ nIf the fault still exists, please restore the system or reinstall it (it is still impossible to format the hard disk and reinstall it in the new partition, otherwise the hard disk must be replaced or overhauled). \ r \ n \ r \ nIf there is no illegal shutdown and there is no problem with the hard disk, boot or scan, you can remove the system scan hard disk in the following ways: \ r \ nClick "Start \/Run", enter "regedit" to open the registry editor, and then select "HKEY _ Local _ Machine". Control\SessionManager\ "sub-key, and then find the" Boot Execute "key item in the right window, clear its numerical data, and then restart (select the file to export the backup before clearing, so as to restore the backup when necessary).

You can also use 360 to see if there is a virus, or some rogue software automatically comes to a system disk to slim down. . .