Not my mother-in-law. She doesn't really understand what an OS is, but she understands a change in user interface.

She knows enough that an upgrade in operating system will change enough that she'll be confused all over again and be frustrated trying to learn how to use her own computer, something she paid thousands of dollars for.

I believe she is still on vista, and won't upgrade because she knows how to use vista, and that was painful enough.

She is, however, the most computer unsavvy person I've ever met that actually uses a computer.