My workstation at work is a great little computer. It’s running Windows 7 and its very reliable and does what I need it to do. However, periodically, usually during periods of large quanities of network traffic, it will freeze. No BSOD, no warning, just frozen.
After some googling, it seems that the on-board Atheros L1 Gigabit Ethernet adpater on the ASUS motherboard has a known issue with Windows Vista, and apparently Windows 7 as well:
Install a new driver The problem may be especially prominent with the Atheros L1 Gigabit Ethernet 10/100/1000Base-T Controller used on ASUS p5k motherboards. This driver (FTP Link), intended for Windows Vista, has been reported to solve this issue under Windows 7 in a variety of cases.
I downloaded the driver from here, and installed it on top of the generic Windows driver for the NIC and not a single freeze or lock-up since.
If you have an ASUS P5K series motherboard, I highly recommend that you upgrade this driver (even if you’re not having these problems as the performance seems better on these drivers).