this has only just started happening during the past few months, but what happens is that after about the 4th or 5th time turning the system on the middle panel but the left panel 'Pins' and the right panel 'Stores' don't display, just keep getting them swirly things. After a length of time maybe a couple of minutes the message comes up 'unable to connect to a wireless service' (or similar). But, my friends list still comes up from the centre panel.
I get round this by holding the start button for 10 seconds and rebooting the machine. Then it'll be ok for a few times then the cycle starts again.
Not sure I've really explained it well, is anyone else having similar problems?