run regedit and add the following entry.

HKEY_LOCAL_MACHINE\Software\Microsoft\Cryptography\Protect\Providers\df9d8cd0-1501-11d1-8c7a-00c04fc297eb

Change the value of “ProtectionPolicy” to “1″

if ProtectionPolicy dosen’t exist, Add DWORD (32bit) Value and then change the value to 1