>Disable any virus-warning features your BIOS may provide. If you have a virus-protection board or other special hardware, make sure it is disabled or physically removed while running Linux. These aren't compatible with Linux, and Linux has a better method of protecting you from viruses.

The BIOS feature is presumably referring to boot sector virus protection that old BIOSes used to have that made them read-only. But what are "virus-protection boards" ? The only search results with quotes are for variants of that page, and searching without quotes gives too many irrelevant results.