10 actually has a smaller footprint than 8.1.This link will answer all your FAQ's regarding compatibility issues and upgrading-
Just got back on the computer (8.1) and saw the little white Windows Icon in my notification area.
Free W10 upgrade and reserve now. OK, I reserved it just because it said that I could choose when to install, because not sure yet if I should.
Just got my W8.1 computer about 2 months ago and like it as it is (after major desktop and "design" changes)
Does anybody know if the Upgrade could be setup as a second OS (like having W7 and W8 on one computer)?
My current W8.1 is OEM, came with the computer pre-installed, no disk, just recovery partition.
I am still unsure what role KB3022345 might play in all this but I do not like the SFC file corruptions, false-positive as they may be, so it is still sitting in my update bin. Am I concerned that not installing this update may cause future problems? A bit maybe but I will cross that bridge when and if I need to.
John, I also had that thought but imagine that MS will 'detect' your version and download accordingly. My laptop is on Win 8.1 Pro; my pc is on 8.1 home - I will be in a position to reply 100% after july 29th.
Thanks Jim good to know. Maybe they just haven't installed all the required updates(it's been a lot in the last few months). I personally install everything, but there are others that do have/get problems.
On a side note, I got my reservation on my desktop 04:45 a.m.(German time) just as I was getting ready to go to work. Now on my laptop, I only have to pull my test disk, with Windows 10 (my version of a VM I like live systems), and put my Win7 disk in and update it too.
I'm in a dilemma whether to upgrade or not. I hate Windows 8 because the UI is just terrible. On Windows 7 I could just press my Windows key and open a tiny sleek menu where I can access Control Panel, Computer with another click, and I could use the Windows key to minimise full screen programs too, while Windows 8 brings this hideous massive screen which requires a million clicks to access anything, and I also have to wait for the animation of the icons appearing. And the UI is such a step backwards, Windows 7 had beautiful translucent menus while 8 has opaque rectangles made in Paint.
But I'm worried that Windows 10 might break my important programs and cause them not to work, especially my games.