WIN8 C-Disk cannot read and write solutions [ZZ]

Do system security when found this/setintegritylevel parameter, did not find more information, find this article, it seems this parameter is a bit magical yo!
A colleague of mine has encountered this problem, the main symptoms:
1, C Disk file can not be modified
2, C Drive cannot create a new file
3, in short, can only read cannot, write and modify
This is the usual operation caused a very inconvenient ~ ~ ~
Copying files to the C drive prompts: Error 0x80070522: The client does not have the required privileges

Way

I found it on the Internet. As long as the cause is likely to be disk read and write permissions, and NTFS permissions, domain mode related
I don't know the exact reason, but I found a solution.

Run cmd with administrator privileges, enter
icacls C =/setintegritylevel M
If you want to recover, use the
Icacls c \/setintegritylevel H
to raise the C-Drive safety level to class H

WIN8 C-Disk cannot read and write solutions [ZZ]