MS Office transferable from old to new laptop?
So, my old work laptop is reaching the end of its lifespan. It's an Acer Extensa 5630Z running Vista. The new laptop is a HP Pavillion running Windows 8. I have installed the same 2007 version of office that I was using on the old machine and copied my files over but when I open them they haven't made the transition in one piece. Worse than that, the new laptop doesn't seem to recognise my version of Office because it still keeps asking me to buy the damn thing from Microsoft. My word and Excel programmes have to be selected as new defaults for everything and I'm beginning to think it's a conspiracy to get my beleaguered boss to spend even more money. I had fervently hoped that by not changing the version of Office I was using, all my thousands of contracts and Invoices etc would transfer across without a hitch but boy, was I mistaken. I know the original document templates were written quite some time ago and on the old laptop they were displayed as running 'in compatibility mode' but I can't find any way to activate that mode again, if it's even possible.
Can anybody shed any light on this? I unfortunately know nothing about computers so you'll have to use very small words.
Many thanks in advance.