Without reading the dmp, this is a widespread problem with older NIC drivers timing out and not working correctly.
About all you can do is look around for the latest chipset drivers for your board and hope for the best. If you fill out your system specs more accurately we can probably find a NIC driver that will work.
Changing the Realtek driver from the default Windows 7 ones can effect your network connection. Try rolling back the Realtek driver using Device Manager and see if it's any better.