Have a network with 30 plus computers. Two file servers running Windows 2003 small business. All of the workstations are running Windows XP. I convinced them that they need to start upgrading to Windows 7 pro. So put in a new Intel based motherboard (DH61BE) with i5, 8 GB of ram, Windows 7 64 bit, Intel 82579v Gigabit Ethernet with latest drivers. Installed the software they use (Office 2007, Word Perfect 14, Symantec Endpoint protection, Amicus). All seems fine. They called and wanted me to come back because system was running extremely slow. I got on remotely, changed the nic to 100mb full duplex and problem disappeared. Went on site and discovered if I keep it at 100mb and reboot, it comes up slow. I change it back to 1000mb and runs fine – until I reboot. I then reverse the process and it’s good again. I tried putting in a Netgear 1000mb card but got the same result. I moved the computer upstairs next to the switches, made sure I had cat 5e and still had the problem. 1) any ideas why this is happening? 2) is there a command switch that I could use to write a batch file to change the network card speed after it boots?