Delete all other versions of MS office on different computers

Nope.

 

You can't. Sometimes software piracy comes back to bite you!

 

If you guys are all on the same network (like the same wireless network, at a school for example), that's why it kicks you off. You could disconnect your computer from the Internet and THEN open Word, and it'll work just fine.

But this will probably get to be rather annoying after a while.

 

1) Recognize you did something wrong - software piracy
2) Recognize that unless you can prove to Microsoft you purchased the original copy and have a valid product key, you are SOL
3) Contact all your friends and request they delete their copies (but I am sure this test of friendship will be failed by several of them; in any event, even if they all delete their copies, you still have to contact Microsoft and be able to prove #2).
4) Be prepared to purchase a new, full version of Office

 

May I suggest an alternative?

I suggest that you give a try to OpenOffice.org. I think that it meets the need of at least 90% of the people. Plus it will free you from Microsoft's bounds. After being a user of MS Office for many years, I switched to OpenOffice.org and I am happy. Never have I to buy another iteration of MS Office. OpenOffice.org is free, open source, open and save to MS formats,… Here is the website where you can download it:
http://www.openoffice.org/

There is also a fork from OpenOffice.org, called NeoOffice. It's not fundamentally different, it puts a little more effort to be "Mac friendly". Their website is:
http://www.neooffice.org

You can download both and use them, and see for yourself which one meets your needs best.

Regards,
Yannick