J-Mac, you look like you need a virtual machine for all that testing. It would save you some time of cleaning hassle
Recently did just that!
However I would still have quite a few apps installed. E.g., I have about a dozen different graphics/digital photo applications. Some overlap features, and when I finally admit that I am not using one hardly at all, I uninstall it. But I do use most for different functions.
When I had this PC built, I had four drives installed in it, dual processors, a bevy of optical drives, etc. I became disabled/virtually housebound a little over two years ago and so a lot of my time is spent on new-found interests: digital photo and video authoring and editing. Lotsa tools for that!