NMCONPID seems to be related to a spyware called netmeter. Apparently it has been installed and partially removed by you. You should be glad that you don't have it anymore.
I can't find anything on FDRV.VXD, but it might be something similar.

To remove the message, you've got to edit the registry with regedit (Start>Run>Regedit). Do it carefully, and you won't get into trouble. And if you do get into trouble, find a working PC and search on this forum for information on scandisk /restore.

In the left pane of regedit, browse to HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\VXD
You'll find a lot of subkeys (like folders in Explorer) and one of those subkeys has a value nmconpid.vxd on the right side. Of course you can also search for the vxd-names you're looking for in stead of browsing to a not fully known subkey. The result will be the same. Same goes for fdrv.vxd.

Some careful deleting will remove the reference to these files at startup, and so the error message will disappear.

Hope this helps,