Question : Realtek network adapter not working

Lenovo ThinkPad SL510
Dual boot OS: Win 7 64-bit, Win Server 2008 64-bit

Issue:
When the system is running Server 2008, the network adapter doesn't work.  However, when the system is running Win 7, the adapter works fine.

What I've tried:
When running Server 2008, I've gone to device manager and found the network adapter icon, which Server 2008 calls Realtek RTL8168/8111 Family PCI-E Gigabit Ethernet NIC (NDIS 6.0), has a yellow triangle with an exclamation point.  I right-click it to view properties. The device status under the "General" tab indicates, "This device cannot start (code 10)."  I viewed the "Advanced" tab and found the driver file name is Rtlh64.sys.  I uninstalled the adapter then rebooted.  After reboot, the device was re-installed, but had the same status (yellow triangle with exclamation point).

When the system is booted with Win 7, I went to device manager and found the adapter is called Realtek PCIe GBE Family Controller.  When I click "driver details", two files are listed, Rt64Win7.sys and RtNicProp64.dll.  Again the adapter works fine with Win 7.

Answer : Realtek network adapter not working

Download this driver (using Win7 if you must and save to USB key) and install it:

http://www-307.ibm.com/pc/support/site.wss/document.do?sitestyle=lenovo&lndocid=MIGR-73425

The problem is that Vista/win2k8 did not have "out of the box" support for that hardware, but IBM released a driver after the OS was released.

Win7, however, did ship with hardware support, so no 3rd-party driver download is required.