Problem:

When yo uclick on My Documents or music ect…you get the error Documents.library-ms” is no longer working

Solution:

you need to delete the misbehaving library first.  Deleting a library does not delete the content of the folder.  To fix this problem, open Windows Explorer, right-click on the corresponding library and choose Delete. Click Yes when asked for confirmation.

Then, in the navigation pane of Windows Explorer, right-click on Libraries and click Restore default libraries.  This recreates the library that you just deleted. This option will only restore the default libraries that came with Windows 7.