I did a factory reset both from inside the android and from the recovery menu. Also I wiped out the cache too. Yes, I looked into HP's support page but I found nothing too, as you said. Is there any possibility in the end, to get the root and don't have the reset problem?
It would be very helpfull If you can send me the image you have as a temporary solution at least. If I find anything I'm planning to make a post in my Greek blog (eyrhka.gr) and post an answer here too. I'm watching this thread for a while but there are too few people own this tablet.