Resolved now for the time being, but can be complex to sort out, many possible causes.
Thanks for the good advice, the V6 box is "working now", not sure what happened to cause the problem but I have had the same issue when connected to the superhub in the past before buying my own router recently.
Reboots do occur regularly while watching TV but usually the TV channels return and can sometimes upset scheduled recordings, I always assumed it is virgin updating the V6 box.
The fault has cleared, but took an hour to reset itself which was unusual, so any fault may appear again.
This has highlighted that that the V6 tv box needs the broadband connection to get the updates or the box may stop working and aslo needed for the apps to work and the epg to update.
All my network connections have always been ok in the settings-network page, but if using my own router there is no support for that. Unlike the earlier Virign tv boxes the V6 need a broadband connection to function correctly.
As the V6 box updates approx every 6 hours, if it does miss an update for some reason, this may upset the V6 box but it is a good idea to click "connect to virgin media services" in the settings network page, which is a "manual update", I have just done that now and it has updated and then gives time of last attempt and succeeded.
I think it is now fixed unless the V6 has an intermittant fault, and presume the unscheduled reboots of the V6 box occurs because an update has failed due to equipment being turned off or wifi failing or a loose connection etc, so the V6 tries to udpate itself by rebooting perhaps and if that fails the V6 box locks out on starting up, so all the checks have to be done in that case as you mention in the reply.
I am also unsure why the updates took so long in my case, the V6 box updated twice yesterday with my interventions, and half an hour each time before working again.
Otherwise, no other problems with the V6, so hope it contiues working and I have left the ethernet cable plugged in now in case of wifi problems and I will also check the updates and do a manual update regularly if needed. I do switch off the V6 and TV and router at nightime so that may be a cause of the updates failing due to the broadband connection being off or the v6 box being off and the next catch up is 6 hours if one is missed.
I has similar problems with my sky now box which is wifi connected and thought it may have been the router auto channel selection but the fault remained when I fixed the channel on 1 so then I fixed my sky now box with a "factory reset" and had to log in again but now works properly each time used and no longer looses connection. Perhaps the V6 needs a factory reset also, but I would not want to loose all my recordings?
The problem was either due to connection issues or udatings issues or may even be an intermittant hardware fault or the V6 box software may be corrupted and needs a factory reset?
I will see if it happens again?
The probem is that when it locks out you can not get into the settings page and the remote also stops working so best to ring 150 for signals to be sent and then leave on startup which can take a long time, in my case half an hour (even with the etherenet cable) and aslo check all physical connections on the V6 box and that broadband connection is working on other equipment, mine was working as my laptop continued to work even though the V6 box was faulty indicating broadband was ok on wifi.
I think connecting an ethernet cable to the V6 box may have helped solve the problem and eliminate any bad wifi or weak wifi signal, my own router is set on medium strength which the V6 box says is "fair". perhaps I will try the high setting and that my help.
The V6 tv box does not have a reset pin like the hub3, so not easy to sort problems without help from the virgin helpline on 150, but wise to do own checks also as pointed out.
alf28