I've been in IT for about 15 years, handling hardware and software for small businesses and individuals. I started out as a bench tech, then went on to work as an outside contractor.
I've installed and configured many Microsoft networks in my time, from Windows NT4 through 2012.
I do not have direct C6220 experience, since it's more of an enterprise system, but I am thoroughly familiar with BIOS configuration, upgrades and troubleshooting OS/hardware issues.
I'll diagnose and either fix the issue or recommend the appropriate action to be taken.