I'm currently running Windows 10 Enterprise on my Dell Studio 1555 laptop.

This is not the first time I'm using Windows 10 Enterprise. Before I format my laptop to reinstall a fresh version of Windows 10 Enterprise, I can connect and receive connections from both ethernet and wi-fi simultaneously. However, after I install a fresh version of windows, instead of receiving connections from both ethernet and wi-fi, i only receive connections from ethernet while the status of connection for both is listed as "connected". If I plug out the ethernet cable, the wi-fi connection will be working fine.  I had gone through forums and the possibility of a altered BIOS setting is one of them. If so, how do I fix it in BIOS setup, if not, what are the other options? Please help. Thanks.