If I remember correctly. Go to control panel/add/remove and highlight "Office" then click on remove. You will be given the choice to remove or repair as Rtus says.
I know that you can add/remove certain features of each program from office but not sure if you can remove individual "Full" programs, you may be able to do this so give it a try, you can back out at any stage. Just need the confidence to keep clicking your way forward and checking the options offered. j.
Thanks for the advice, I've un-installed & re-installed Office97. Excell now works OK but when I try to access Word I still get the message:- 'Winword has caused an error in <unknown>. Winword will now close>. Any further ideas please?