Read very carefully!!!

How to install "ExplorerFrame.dll" (Windows 8 navigation buttons):

For Windows 7 64bit users:
Take ownership (permission) of a file "ExplorerFrame.dll" from folders "C:\Windows\System32" and "C:\Windows\SysWOW64" and rename it to, for example, "ExplorerFrame_old.dll".
Copy "ExplorerFrame.dll" from folder "ExplorerFrame\System32" to "C:\Windows\System32" folder. Also copy "ExplorerFrame.dll" from folder "ExplorerFrame\SysWOW64" to "C:\Windows\SysWOW64" folder.

For Windows 7 32bit users:
Take ownership (permission) of a file "ExplorerFrame.dll" from folder "C:\Windows\System32" and rename it to, for example, "ExplorerFrame_old.dll".
Copy "ExplorerFrame.dll" from folder "ExplorerFrame\SysWOW64" to "C:\Windows\System32" folder.

Log-off or Reboot your computer.

Tested and work on Windows 7 64bit SP1.

How to take ownership (permission) of a file you can find on this address:
http://www.askvg.com/guide-how-to-take-ownership-permission-of-a-file-or-folder-manually-in-windows/
http://www.askvg.com/add-take-ownership-option-in-file-folder-context-menu-in-windows-vista/

All you are doing, doing at your own risk. For the possible consequences i am not responsible.