I am very happy with Windows 7 that I installed when I rebuilt my desktop. Just be sure to load up on RAM..I'm running 6GB. I also really improved the performance of my Windows 7 machine when I updated all the component drivers to the very latest versions
Well he’s fortunate to be using it in such a limited capacity. If your brother-in-law should ever try to use another OS, I’m sure he’d be surprised (and liberated) to discover how much more intuitive a superior OS can be.