This folder is a system folder and cannot be deleted. In addition, check whether your partition is FAT32 partition. If so, there may be a situation that the disk record does not match the actual space used. At this time, you should run Disk Checker, click Start-Run-Enter "chkdsk c: /f" (without quotation marks)-OK, and the system will prompt that the partition is in use. Do you want to check it at the next startup? Just press the y key to enter, restart the computer and let it check. After restarting, enter convert c: /FS:NTFS in the command line mode to convert the file system to NTFS to avoid this situation from happening again.