Another looooong wait... aaaand technically the only thing on my desk that runs windows
(When it's not randomly hard faulting in places that make no sense...)
... and now I'm consistently failing the memory test at 544k for some reason...
After finally tracking down some memory corruption (so fun) and fixing up a bunch of other bugs it starts more reliably.
(Bit flickery when lots of RAM written)
Well, I left it running and it hasn't crashed so that's something...