I'm running out of what little I had, and I'm not the most patient guy in the world to begin with.
How long has been "endlessly"? I read one report that it took over 24 hours for his update, but he said the key was patience...just leave it alone.
I couldn't do that though because I don't have patience.
Endlessly in this case is 4.5 - 5 hours today. I set my laptop power options this morning to never turn off or dim the screen and I upped the sleep & hivernate onset delays to 5 hours (the highest available except for 'never' and I'm not doing that), so I shall be patient until I go to bed tonight. I'm not leaving it on all night.
Thanks.
You don't have to worry about the PC. It's not part of the upgrade process.