Hi Dave,
I have 5.3 and 5.4 working on my laptop running Windows 7 Ultimate. I
haven't noticed any issues yet. I guess what PTC is saying is that 5.3
*may* work, but if you uncover an issue that is due to something in
Windows 7, then they will have no obligation to fix it.
What would be really interesting to learn, is that during PTC's own QA
process for Windows 7 certification on 5.4, did they have to fix any
bugs that were directly due to Windows 7 differences. That would give
you a guide as to what, if anything, may be problematic in 5.3. Perhaps
some clues will be in the 5.4 M030 release notes?
Cheers,
Gareth