Upgraded to Windows 10 and Ubuntu 15.10

... and that's it.

Absolutely no problems at all. I didn't even have to reinstall GRUB as some sites warned me I'd have to.

That's a dual boot machine, partitioned flash drive.

I don't know what else to say, I almost feel cheated. Both upgrades took about 15 minutes.

Looks like I've got no excuses for not filling in my tax return now.