computer asking for microsoft office 2000 sr-1 professional disk

While running different applications or trying to open different emails, the computer tries to open microsoft office 2000 sr-1 professional.  It then asks me to insert the disk - which I do not have.  I do not have MS office 200 SR-1 Professional installed on my comuter.  Why is this happening?  I usually have to click on cancel 10-12 times to get out of it.