I recently started having problems where a PC would lose its network connection overnight. After investigation found that the network would drop when my WHS backup started. I found that if I rolled back the network driver all was well.
Note that the NIC was the Atheros L1 Gigabit mobo NIC for an Asus P5B-E and the OS is Win 7 HP. The drivers that work are 2.4.7.172 dated 6/19/2009.
The driver was installed as an optional update as part of a Win7 update process - note that I was a few months behind in updates but this updated driver was dated Oct 2009.
Note that the NIC was the Atheros L1 Gigabit mobo NIC for an Asus P5B-E and the OS is Win 7 HP. The drivers that work are 2.4.7.172 dated 6/19/2009.
The driver was installed as an optional update as part of a Win7 update process - note that I was a few months behind in updates but this updated driver was dated Oct 2009.