I have to PC's that belong to the same homegroup. When I go to explorer, there is a delay before the other PC shows up and yet another delay when I select to browse that PC. If I close and go back I'll often get this error code and then there are time when I get the code on the first try. These PCs are running Windows 8.1 Pro and powered on 100% of the time. I noticed this nonsense while on Windows 7 as well.