Hello TechKnow members and visitors!
Today I was challanged with 3 pc's in my network that experience terribly slow LAN transfer speeds on file copy. I was copying files and noted that these 3 systems running Windows 7, 32bit and 2x 64bit took about 3 hours to complete, where the other XP machines were done in just a few minutes.
It didn't took long to discover the problem here, go to the network adapter's properties:
1. Quickly open these on Windows7 by running: control ncpa.cpl
2. Richtclick on your network adapter and click "properties"
3. Click on the "config" button
4. Click the "advanced" tab
5. Set "Large Send Offload v2 (IPv4)" to Disable
6. Set "Large Send Offload v2 (IPv6)" to Disable
7. No reboot required! Transmission speed should be better right on the go! I've tested it while copying a large file and the change of these properties only affected the transfer speed and didn't even interrupt the copy. Note that on a different network adapter you may experience a different reaction.