1, Use the Avast Uninstall Utility to completely uninstall Avast and then download and install Microsoft Security Essentials. 2, Update the following drivers: Realtek PCIe GBE Family Controller fffff880`04a00000 fffff880`04aa0000 Rt64win7 Tue Sep 27 16:50:33 2011 (4E81E2B9) AMD IO Driver...