I found this on
http://www.longhornblogs.com/
I thought my problem was my Linksys router but it was really my network
card. I have an onboard Marvell Yukon NIC on my Asus AV8. This fix worked
for me.
Anyone who has installed Vista 5536 on a machine with a Marvell Yukon NIC
knows that it has issues, you cannot browse websites or really do anything
functional on the network. One easy way to fix it is to of course install
the XP NIC Drivers. The other way however, lets you keep the Vista driver
and just fix the root of the problem. Here's how to do it:
1. Go to Start -- Run and type "devmgmt.msc" without quotes.
2. Expand Network Adapters
3. Right Click the Marvell device and go to properties.
4. Click on the advanced tab.
5. Select IPv4 Checksum Offload and set the Value to Disabled.
6. Hit ok and enjoy!
NOTE: This may also work for people who have Realtek network devices and are
experiencing hard system lock-ups when doing anything on the network. No
promises there but I can confirm this works 100% for Marvell.