Run the CMD input with the administrator
icacls c:\ /setintegritylevel M
Icacls is a command-line tool that displays or modifies a random access Control list (DACL) on a specified file and applies the stored DACL to files in a specified directory. Icacls.exe replaces the cacls.exe tool for viewing and editing DACL. ICACLS is an updated version of the CACLS tool in Windows Server 2003 SP2 and can be used to reset account control lists (ACLs) in files from the recovery console as well as backup ACLs. Unlike CACLS, ICACLS can correctly pass changes and creation to inherited ACLs. For more information about the use of ICACLS and the commands, you can run “ICACLS /?” at the command prompt. Make a visit. C) Improved upgrade of C) Improved upgrade of C) Improved upgrade of C) Improved

Reproduced in: https://www.cnblogs.com/zedzhao/archive/2010/01/15/1648225.html