SX87 WL freezing

I've had the SX87 WL for around a month, it's generally worked OK, except for a freezing problem, while watching a channel the screen will sometimes go blank and the receiver is unresponsive to the remote, it also sometimes freezes when changing channels. Switching the box off and on resolves the problem, but I don't know what's causing it or how to fix it.

The box also froze without losing the picture and I've also had sound loss. This is very disappointing considering I had similar problems with my previous satellite receiver, but worse.

I have fixed it. I did a factory reset, I don't have the problem now. Make sure you back up your settings before you do the reset.