wow really? I never have problems with my homegroup on my Surface except once in awhile it'll take a along time to connect to it in the beginning...but when streaming movies to my Surface it works flawlessly.
At first I was able to stream music perfectly, but it gradually got worse and worse (any ideas why!?) so in the end I gave up and bought myself an SDXC card for all my media. It's a bit of a shame as my Windows 7 desktop PC is basically redundant now. Might set it up for mum somewhere to stop using my Surface!