Hyper-V and Win2k3 Network Card
So if you are installing a Windows Server 2003 machine as a Hyper-V machine, you will find out you need to install Service Pack 2 prior to installing the integration components (this is the software that increases performance, improves mouse functionality, etc.). Besides inserting a DVD and accessing it, there aren’t many other options, since the network card configured by default doesn’t work until the integration components are installed.
The solution is to remove that network card and add a Legacy Network Adapter under the Add Hardware section.
This network card works regardless of whether the integration components are installed, but it is not as fast. So once you’re up and running, don’t forget to revert it back.