Last year I had issues (continual freezing) with a YouView box and was sent a replacement. A few weeks ago I started getting problems with the replacement too, mainly the inability to record.
This could be resolved by rebooting the unit but things have gradually got worse and I get the recording issue regularly and the menus and guide work intermittently now and the box regularly freezes. Reboots sometimes fix this but it's becoming more frequent that I need to reboot more than once or have to power off and leave it for 30 minutes before retrying. I've tried soft resets, checked for updates and last week did a maintenance reset too but the issue still remains.
Is there anything else I can try?
Have you tried the full factory reset from the settings menu. This will wipe the hard drive and set this back up but is the last option to try.