I've had an issue that came up totally out of the blue a few weeks back; Basically when I sign into my gold account on my Xbox 360 S with a wireless connection, the Xbox runs incredibly slow and usually crashes/freezes up. It's not just when trying to download, but even just moving blades causes this issue.
When I use an offline account or when I play an Xbox Original game that doens't connect to live, things run perfectly smoothly.
I've already sent the machine away for repairs, and when I got it back this week it still has the exact same issue. I've tried returning to factory settings, clearing the cache and power-cycling the internet connection with no success, can anyone help me out?
Any advice is greatly appreciated thanks!