This read-only integer counts receive packets at this PC that experienced internal errors, such as a lack of available receive buffers. An admin treats a rising internal receive error count as a sign the PC's own network card or driver is struggling to keep up with incoming traffic, rather than a problem with the network itself. For example, a workstation with an older network card showing climbing pcIntRecErr counts during a large file transfer would suggest that card's buffering can't keep pace with the incoming data rate.