I did upgrade to Windows 10.

During the upgrade, Microsoft automatically deleted my pdf files provided by the manufacturer of my computer (HP). You know, things like owners manuals, setup guides, etc.
They said that they were not compatible with windows 10.

I did like the look of windows 10.

However, I should be the only one who decides what does and does not get deleted from my computer. Therefore, I switched back to 8 and refused to update my desktop that is running windows 7.

On a side note, updates are automatic as well. You do not have an option to simply be notified and make a decision if the update is desired or not. I suppose nobody ever had an update from Microsoft make matters worse :)