Office coruption

I have a network of ten computers running window NT server on the server.
The office 97 software will open, but when you want to open a document, It will tell you insufficient memory. But other application like coreldraw 9 open very fine. Also, a new file is created whenever you copy anything. This is a word file and have gabbages inside it.
I have tried uninstalling the office in one system and reinstalling. It worked fine first but starts the same problem again. And only the server has CDrom and Floppy disk. I have much error trying to install office to the clients using the server resources.
Can anyone give me a solution to this.
Thanks