Hidden drivers can exist in your Windows computer which can cause problems. You may be able to remove these drivers with the following method. This is a common problem after performing a P2V conversion. For example, the virtualized server will probably contain new NIC drivers while the original NIC drivers from the physical server remain in the operating system. The original drivers might cause problems if not removed.
1) Click the Start menu, click on All Programs, click on Accessories and then right click on Command Prompt and choose Run As..., then Launch the command prompt as an administrator
2) Type SET DEVMGR_SHOW_NONPRESENT_DEVICES=1 and press enter (nothing will seem to happen)
3) Type DEVMGMT.MSC and press enter to launch the Windows Device Manager Console
4) In the Device Manager, click on the View Menu and then click on Show Hidden Devices
Now, when you expand the different devices in the device manager you will see both hidden and active devices. The hidden devices typically appear greyed out. You should be able to right-click on unused devices and choose uninstall to remove them from the server.