I have RTM version of Windows 7 (RAS-in and installed from Control Panel) installed on Dell Vostro 400. The Network connection will be lost if no activitie is going on > 15 mins. But If RAS into corpnet, the network won't get lost even with no activities.... The only thing to keep the network connection back is to reboot the system. When the issue occurs, I notice that:Windows Netwrok Diagnostics reprot shows: Issue Found "A network cable is not properly plugged in or may be broken"on back of NIC, Green/Amber LEDs are not blinkingUninstall NIC driver/reinstall or upgrade Vista veriosn of NIC driver won't workEnvironment info:The Devise Manager shows. NIC is "Intel(R) 52562V-2 10/100 Network Connection"The driver is "c:\windows\system32\Drivers\e1e6032.sys" with file version "18.104.22.168" built by: WinDDK...Same issue with Beta version 7100 or Windows 7NIC works fine with Vista Home or Enterprise versionsIs this a known bug in Windows &? Any help will be greatly appreciated!