This is the ULTIMATE productivity OS.
The workflow is just insane compared to other OS:es, WinXP may come close but many important software wouldnt work in XP, not to say XP GUI is bad or anything.
Win7 GUI is very nice and wont get away in your work. There also will not be annoying messages when you try to do something the OS doesnt want you to do.
Win7 is real fast if its timelocked into year 2013 (do not install anything from Microsoft after the year 2013, including updates)
These are the necessary parts:
-SP1 (should be on the DVD image already)
-Visual Studio 2008 (delete this after the install, the important thing is Windows 7 updates or new OS features it installs)
-Visual Studio 2010 (delete this after the install, the important thing is Windows 7 updates or new OS features it installs)
-Visual Studio 2012 (delete this after the install, the important thing is Windows 7 updates or new OS features it installs)
-Visual Studio 2013 (delete this after the install, the important thing is Windows 7 updates or new OS features it installs)
Now it should have .NET 3.5 with updates, .NET 4.0 with updates, .NET 4.5 (not up to date)
Visual C++ Redist 2008,2010,2012,2013
There is not much else that is absolutely required to run most Windows 64-bit software. Unless it's from the year 2015+ when it requires more shennanigans. 2018+ probably wont work in Win7 at all. But developers are at fault in here.