Windows 7 is reliable, but with some quirks (what OS doesn't have some?). Windows 7 was able to mimic the look and feel of XP with the addition of a freeware Desert.exe theme and menu, giving consistency across the network. It is on three of my seven PC's, two have XP, and one is running Linux Mint 17.2 Rafaela, Cinnamon desktop version (64-bit), and one Windows 10 laptop was just converted to Linux Mint 18 “Sarah” Xfce Edition with Cinnamon desktop (64-bit). I find myself using the PC (AMD Phenom II X4 965 CPU home built) with Linux 17.2 more than the Windows machines. While there is a learning curve after using Microsoft products beginning with DOS and the Intel 286 processor, it is proving faster and more secure than Windows. The latest distributions are far superior to those I tried a decade ago, Linux Mint 17.2 Rafaela with the Cinnamon desktop loaded, and amazingly found and installed all the components, including my wired network, el-cheapo ASUS video board and the HDMI TV I use as a monitor, and the Canon MFD printer. I had to learn how to install a clientless VPN connection with tunneling to Hide My Ass, but by following HMA's instructions, and several cups of coffee, it has been up and running. The Linux Mint 18 installation is working, but I am still fiddling with it, but it too looks good. We will be using Windows 7 on the machines it is currently installed on, as my noble assistant does the financial stuff on them, but in time I see a complete switch away from Windows entirely to Linux. In my opinion Windows 10 is a disaster well worth avoiding.