There is an issue with the Windows Update incorrectly Identifying the
Realtek RTL8139/810X Family NIC as "TE100-PCBUSR 32-Bit Cardbus PC Card".
It's Microsoft's fault, however:
The source of the problem is an out of date driver on YOUR computer. To resolve the issue, download the latest driver from Realtek
The 8139 Family just happens to be the most common PCI card out there. The most common solution I have seen on the net is to hide the update. That's fine for some people, but I like my software to be in tip top shape. I'm a technician after all.