Scroll Lock key on for keyboard lights but off for Excel

My keyboard uses the Scroll Lock key to turn the lights for the keys and key background on and off. Excel uses the same key to control movement when using the arrow keys. How can I "tell" Excel the Scroll Lock key is always off even when it is on? I have to believe there is a registry entry I could make do this. Remapping the keyboard doesn't work. I remap the Scroll Lock key and the keyboard reads that key as well. Any ideas please.