Windows 10 Announced
First try: online through Windows Update. Froze with black screen at ~40%. Rebooted and it restarted with the original Windows OK.
Went to Windows Update and shut down the new download. Then downloaded the disk image and burned it to disk.(I'm sure some people would have wanted it to be at the stake).
Shut down computer(only way to unplug external disks safely), then restarted and shut down(paused) antiviruses including Windows Defender(which was already off) and exited all other taskbar programs.
Started Update disk, but it did nothing so I ended it with Task Manager. I had lost my internet connection so I unplugged and reinserted the USB cable to the wi-fi adapter. Got the internet back and when I restarted the Setup with internet, it got going.
No problems and it restarted at 87%. That restarted again at 30%. A momentary blanking at 43% and the 3rd restart at 75% which continued without errors and restarted me into the new version with tedious intro texts. No problems after that and all my programs were still there(Classic Shell did have to re-configure for the new OS). I reconnected the UPS and restarted the antiviruses, the got a screenshot of the new version with winver and came here.