To unblock windows from hiding protected operating system files

For folders:
1. To unbind a folder from a disk (example):
attrib d:\ "program Files"-s-h/s/d
2, unblock all folders of a disk forcibly hidden (example):
attrib d:\ "*"-s-h/s/d
--friendly tip: In the example above, D: is the disk letter; The quotation marks are the folder name; related Command parameters:
+r           Set read-only file properties.
           -R Clears the read-only file attribute.
+a           Set the archive properties.
           -A clears the archive property.
+s           Set the System file properties.
           -S clears the system file properties.
+h           set hidden file properties.
           -H clears the hidden file properties.
           /s applies attrib and any command-line options to matching files in the current directory and all of its subdirectories.
           /d applies attrib and any command-line options to the directory.
/?           Displays help at the command prompt.

For files:

ATTRIB [+r |-r] [+a |-A] [+s |-S] [+h |-h] [[Drive:] [path] filename] [/S [/d]]
   +   
   -    clears the attribute.
   R   read-only file properties.
   A   Archive File property.
   S   System file properties.
   H   hidden file properties.
   [Drive:] [Path] [FileName]       Specifies the file attributes to be processed.
   /S  handles matching files in the current folder and its subfolders.
   /d  also handles folders.
For example

Attrib-s-h-r C:\*.*

To unblock windows from hiding protected operating system files