I am running AutoCAD on Windows 7 and would like to upgrade to Windows 8 (in-place upgrade, which should preserve programs and settings). What is the impact to licensing and activation? Will I need to re-activate?
Win8 is unsupported: may or may not install or work.
If you have to reinstall AutoCAD, then yes you will need to reactivate just like any other installation of AutoCAD (if it comes up, see first sentence above): if you don't have to reinstall AutoCAD and it does come up there is nothing to do except use it.