Apparently the Ethernet NIC that you installed is reporting to Windows that it is a trendnet, teg-pcitxr, pci adapter and the reason the Windows updates wants to install updates.   Download and run the free SIW (System Info for Windows) program.  It will profile your PC and let you see what the NIC card actually is.   [URL]  
Hi, Dimension 3000, xp pro, ie8. My ethernet connector is a realtec, (bought from Dell when installed one quit.) Microsoft update has an optional hardware update for trendnet, teg-pcitxr, pci adapter. As far as I know I do not have any trendware products. The only pci things I have in device manager are a pci bus and a pci bridge. Do I need this update? What is it updating if I have no trendware products?
Trendware optional hardware update, necessary?