I have been unable to connect my Pc to the Beomaster 5 for sometime now, coincidentaly after Win 10 appeared. At first it was hit and miss whether it connected or appeared as a mapped drive, but then even the Beosound said there was no internet coonection. Not being one to give up and I have no knowledge of PC's or how a beo systen connects, I just kept trying not knowing what to actually research or what I was looking to resolve.
But yesterday I solved it, Oh!! it was simple. Microsft stopped using somthing called SMB1 in 2014 and latter versions of Win10, this web page has more info. https://support.microsoft.com/en-gb/help/4034314/smbv1-is-not-installed-by-default-in-windows.  It appears you have to turn on SMB1 in "Windows Features" i.e. tick the box. Make back ups before you start. I accept no resopsability if it doesn't work for you. Ironically though in network info on the Beosound it still states Network Connection "NO".