Hi John,
Realtek PCIe GBE Family Controller – the driver for gigabit network controllers on the basis of chips from a company Realtek. These network comptrollers are often built-in in system boards. These network comptrollers are often built-in in system boards.
We're here to help you with this issue. This issue could be caused due to compatibility issues between drivers and the operating system. I would suggest you to try these steps and check:
Realtek Pciefe Family Controller Driver Download
First, let run the built in network troubleshooter which can automatically detect and fix most of the incorrect settings that could cause network issues. Right click on the network icon in the notification area and select 'troubleshoot' to launch the Windows network diagnostics tool. If the issue still persists, then I would suggest you to install the latest Windows 7 drivers from the manufacturer's website in compatibility mode and check. You can download the drivers from the following page:
Realtek Pcie Fe Family Controller Driver
Once you have downloaded the driver file, right click on the file, choose 'properties' and then install then select the option to install the driver file in Windows 7 compatibility mode. Keep us posted on the results for further assistance.