Tbh I'd still be on XP if it had dx10&11, and had superfetch.

some simple tasks on window 7 is not logical on windows 10
Like what for example?
The backup tool has been changed, and it isn't immediately obvious how to simply make a system image without turning on file history, and having it decide what file types and history it wishes to generate.
I am still messing about to get it as I want it to be.
All the posters with reactivation issues, can you say whether you have retail or OEM systems and also whether it is Home or Pro win10.
Flashed my BIOS to a newer version and, days later, changed my CPU. Windows 10 remained activated through both changes.Ive replaced my CPUs (2x Xeon L5520 -> 2x Xeon E5640) ive also swapped my Ram (8x2gb -> 8x8gb) and luckily I haven't had any activation issues, my next move is to migrate from an old 2tb 2.5" Sata bootdrive to a 256gb SSD... ive a feeling that might not go as smoothly.