The problem is where the boxes simply lock, freeze and become unresponsive.
The advice is to simply reboot the Sky+HD box.
However, some users are doing this three or four times a day. But Sky say, in a statement, they are working on the problem
Unresponsive Sky+HD boxes | 16 February 2015
We’re aware of an intermittent problem with some of our Pace and Samsung Sky+HD boxes. The problem causes the box to freeze or become unresponsive. If this happens to your Sky box, you can fix the problem by rebooting your box and checking your cables.
We're working hard on a permanent fix and since our last update we’ve been carrying out in-depth testing to find the root cause.
We’re still working on this and we'll provide further updates when we have more information.
We’re sorry for the inconvenience caused.