Create a restore point before upgrading to 10...

[bonskibon37]

Just in case something goes wrong and you need or want to revert back. I went back to 8.1 and it was a messy task as many of my apps were not functioning because of the upgrade. I looked into my restore points and found one I made the day before upgrading and ran it and everything went back to normal before the upgrade. I will be personally waiting at least a couple of months before trying windows 10 again.