In the last week i had some hardware upgrades done on my PC and in their wisdom the shop installed Vista Ultimate Ov and Office Enterprise 2007. Previously I had XP SP2 . It all works wonderfully well..no problems and all the old files converted nicely...however...I have had reports that photographs I have sent as e-mail attachments cannot be opened by my XP user friends....and my wife has burnt some cd's and floppys with programs and notes for university students only to find these will not open on XP systems either.

Is there some compatibility problem between the two systems or am I missing something?

I need to sort this asap....Should i re-install XP?

Thanks for any advice

In office 2007?? If so she would need to save it in a compatible version especially if others are using a lower version of office.