I have a new windows 8 Laptop I installed Office Professional Plus 2010 successfully. However, office documents attached to email, and existing files will not open (surprisingly they will preview) without a dialogue box requiring the licence key. The licence key already accepted on install is now rejected! 

Windows 8 is horrible. The cursor movement causes unexpected switching between tiles. Everything is counter-intuitive and hard to find.

My worst nightmare. Productivity shot to pieces.