OK, I forgot to mention something.
Since the box that I'm using was supplied by my university, IT has crafted a custom image that has NO bloatware (including HP ProtectTools - bleech), NO trial programs, NO unnecessary
drivers, and nearly all of the software we will be needing for our stay here, such as SolidWorks, LabView, etc. I have already disabled nearly all non-essential startup items (SolidWorks background downloader, etc.). What's more, I got a third re-ghost last week, and only installed the essentials before taking an image for restoring the system myself.
As for the broken car analogy, I think it's a bit inaccurate. If you get a flat tire, you replace the tire. However, if your car has 250 horses under the hood BUT also has a history of stalling at the most inopportune times, you wouldn't use it to enter a street race. I can't yet justify buying a new car, but if I can get my current one to stop stalling, that would be great.
I do like the user account idea - I might just do that.