I'm trying to load some older software on a Windows 8 computer with a 2T hard drive that, from research, I've learned requires a C drive that's under 1T. In Windows 8 there's an option to shrink a volume (control panel-admin tools-create/format drive-action-all tasks-shrink volume). If I shrunk the C drive to 800G (it's been defraged and consolidated and only has 300G used) would that work without erasing the operating system? How would I get back the other 1.2T for a secondary drive? The option to create a virtual hard drive seems to want a letter which that section wouldn't have.
I'm hoping to partition the drive without having to reload the operatin g system.