For win Home Users:
you can edit the registry yourself by doing this:
1) open Notepad:
2) copy this text and past in notepad:
Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa]
"lmcompatibilitylevel"=dword:00000002
3) save the file on your desktop (or anywhere else) as name.reg - ".reg" is important.
4) run the file and press yes on the 2 poppups.
Now it should be fixed.
ref: link
