Honestly, install Classic Shell, follow the instructions you can find on the intertubes to make the Metro crap almost completely go away, get rid of their stupid start screen altogether, disable the Windows store and the apps ... and then just realize that the crap Microsoft has "innovated" is useful for touch screens, and beginning users and get on with their life.
Epic fail. If I have to do that to even start using it, it is wrong.
Windows 8.1, once you remove the crap interface stuff Microsoft put into it, is a stable platform with a Start menu, which looks like it has for years.
Windows has become ever more convoluted over the years. 8.1 does not offer improvements. It uses more disk space, more RAM, and more CPU than ever before. In Windows 7, there are several dozen process running at any given time that I have no need of and can not turn off without crashing the operating system. Those processes more than doubled from Windows 7 to Windows 8.
You can argue all you want that they provide awesome services that make my life so much easier... but it is not true. I do not need port 445 sitting there listening. I do not need their fancy DNS services. I do not need half of the processes opening up under svchost.exe and hiding themselves. I do not need Active Directory subsystems functioning at home. I do not need my operating system to try and discover shit on the network. I do not need my operating system trying to force an election to see who wins (pun not intended) the ability to be authoritative about Microsoft protocols on my network. I do not need my operating system trying to enforce DRM. I do not need my operating system to continually multiply the number of hidden places program can start from.
The product is shit. 8.1 is worse shit than 7, and by definition, 10 will be worse shit than 8.
Install a fucking cover over the shit and call it good to go? Stop smoking that stuff my friend. Just stop. Lipstick on a pig does not fool me.