Windows 11 on both computers. I also have Ubuntu VMs. I had this computer set up to dual boot between Windows 10 and Ubuntu at one point, but then I used the Ubuntu hard drive to install Windows 11.

Windows 7.

Weeeell...I bought a laptop that shipped with Windows 11 that I downgraded to Windows 10 because I was butthurt that Microsoft has apparently removed the ability to move the taskbar to the top, my main gaming rig nags me to update to 11 but I'm staying on 10 for the same reason...I also have a laptop running Ubuntu and several VMs running Windows 11 and various flavors of Linux for testing and trash-talking Microsoft purposes

Windows.

My trusty linux and windows 11.

macOS & Linux

macOS and Linux

Windows

Windows 11