First thing is to search for
"Windows 7 Upgrade Advisor"
and try it.
Then its BACKUP time............ and then you can do the upgrade (if you are game)
The upgrade process took about 2 hours from inserting the DVD on my laptop.
After the upgrade, just about everything worked, for Access developers, the ability to switch between Access versions fell back into the old UAC trap discussed here.
Once you have made the jump, virtual PC is place to run those old Apps