Just a short update: I can now confirm this is an issue in Windows 7. It is apparently caused by the new (stricter) SMB signing settings of Windows 7.

It may be possible to work around the issue by tweaking the SMB settings, but this is clearly not for the faint-of-heart and should be carefully considered and aligned with the security guidelines you have in place.

I will update this post if and when a fix for Windows 7 is made available.

Ruud