IRQL_NOT_LESS_OR_EQUAL random BSODS

Dear SevenForums, I am encountering seemingly random IRQL_NOT_LESS_OR_EQUAL BSODs with error code "d1". In the past, these BSODs have primarily reported that one of my two NIC drivers is causing the BSOD. Before I start making changes to my system, I would like to ask if someone would be willing to analyze my minidump files and, if possible, provide me with advice as to how to proceed from...