I do not think the installation of BroadBand has anything to do with the 'Word' program Problem as such.
Please identify the exact operating system.
Go to 'My Computer'/ Help/ about. to find this.
If you have to 'Word' disk and the corrected key number. - This number will not be on the computer but on the accomanying documentation with the disk.
Run the disk and it should offer the opportunity to repair or reinstall.
Two usaeful sites