"One definite fault is the amount of times it's crashed during 'Restart'
- it'll switch off then hang on the opening reboot screen.

Which necessitates pressing the off switch, then pressing it to start back on again...

Most disconcerting during driver & software updates which require a restart !!!!

I am currently googling this unacceptable problem...."

It's been doing that for quite a while on my Win 8.1 machine. I'm getting updates at the rate of a dozen a day, but even though I run the updates manually, the Restart falls over. I do the bottom-pressing thing, then it tells me that it couldn't finish the updates, and it's undoing the changes it made. Aaaaaaaaaaaaaaaarrrrrrrgggghhhhhh!!

It's a PITA. I don't see how Win 10 can possibly be any worse than 8.1. I'm going to do the upgrade -assuming the download of Win 10 (which the app has been telling me is "downloading in the background" for the past ten days) ever happens.