"He who marches out of step hears another drum." ~ Ken Kesey
XP, jesus man. Time to move on haha.We haven't moved from 7 yet, but will move to 10 I think. I refuse to use 8, it came on our shipping computer, its terrible.
I usually never upgrade a computer to a totally new operating system. I always stick with the one originally installed. If needing to use an updated OS, as is sometimes the case with my Macs, I'll install the new OS to a partition of an external thunderbolt drive.
Could a person clone his OS drive, and then upgrade to 10 on the new drive. If it doesn't work, switch back to the old drive.