I asked the question yesterday about my hardware wizard popping up every time I start my computer. ?

I was told to go to my device manager and I did. My Ethernet Controller had a yellow exclamation point next to it so I clicked to reinstall driver. During that process it says: file bcm4sbxp.sys on Broadcom 440x 10/100 Integrated Controller install disk needed. Type the path where file is located, then click ok. I have no idea where the file is located and I don't have a disk either! Any help please?