Which OS are you using and Why ??? I am Windows 7 on my Desktop and Windows 7 on N5110 and Windows 10 10051 On Dell N4050
I run one dual boot Windows 7 Pro x64 (upgrade) / XP Pro (OEM) for my 16/32bit needs and one with Windows 8.1 x64 Core (factory) I also keep virtual Win95 and 3.11 for when I need a nostalgia kick.
ATM, I am using OS X 10.10.3 & Windows 8.1 Pro x64. OS X because it's a fresh breath of air and Windows 8.1 sorely due to it being much more flexible when it comes to productivity & compatibility with wide array of free/cured apps.
Windows 10 on both my PC and laptop. The PC is dual booted with windows 8.1 on a VHD (use it for legacy software). Then I'm running another copy of Windows 8, Ubuntu, Mac OSX El Captain, and Android Kitkat on VMware. I have ISOs of so many other OSes. Pretty diverse system going here
8.1 and 10... Upgrade all Windows 7 to Windows 10, some are still using Windows 8.1, until it was time to upgrade ... Why use windows 7 when Windows 10 is very stable and free.
Windows 7 on 5 laptops and 1 desktop. XP on 2 laptops and 1 desktop. Just reliable and have gotten used to them. Will probably image back up machines (Win 7) and install Windows 10 then go back to 7 just to be able to use Windows 10 if I ever want to in the future (cant figure out for the life of me why I would....) Android JB 4.1.2 on 2 tablets and 1 Moto Droid.