Cleaning OS from old C: drive that now only serves data
The word "from" should follow OS in the title.
When I moved my OS to a Solid State Drive, I retained the ability to swap cables and boot into the old 1 G hard drive. Because that one had all of my working files on it, I renamed it Data disk and just left Windows and all the old program files that were duplicates of the newly installed versions on the new C:\.
Now I want the space, but getting rid of things is non-trivial. Removing some program folders requires the blessing of "Trusted installer." I would like to just delete the Windows, Program, and Program (x86) folders but i suspect the evil gremlins from Microsoft would not respond quietly.