First, I want to say, I am new to Steam, I came on board in DEC, 2013, I was on steam many years ago, when I purchased the "Orange Box", I actually purchased at the store, no download, yeah, that long ago. I am also a Certified A+ IT Technician, along with some Microsoft Certifications too. I got on board to steam with the purchase of two game bundles, BIOSHOCK and Borderlands. Since I was mainly gonna play these games I built a PC that met the minimum spec of the latest game, BSI, Q9650 with a 560 GTX Ti on Windows 7. My PSU died on that PC and I pulled out an older PC that ran Vista (yah, Vista), I only uploaded Borderlands 2 and it runs just fine.
When I did the downloads/install for BIOSHOCK bundle, I had issues running them in Windows 7 on the first PC, had to make some change and download extra stuff.
I am looking to re-purchase the "orange box", and a few older games. Which Operating System in your opinion would be better to run? Vista or Windows 7 for steam games?