Removing Citrix Windows PV Drivers

It would be nice if you could just uninstall the Xen Tools, but it isn't that easy.  Here's the process you should go through from the console (you may or may not need all the steps depending on how fussy your VM is):

1. Uninstall Citrix Xen Tools from the Add/Remove Programs Control Panel section.
2. Reboot
3. Your system will detect a SCSI device.  Say No to the hardware wizard using the Internet to download a driver, tell it to detect automatically, ask it to not prompt you again, and hit the Finish button.
4. Fix your IP address so you can connect to your network again.
5. Search for XEN\VIF\0 in the registry and then delete the GUID key that the Network adapter is stored under.  So, once you find XEN\VIF\0 in a key, you'll need to look up two steps to find the key names {23a33f32f-23f32f232f2-23f23f232f-23f32f3223f} (or whatever yours is) and delete it.  You'll need to do this a few times.
6. Delete any Citrix oem*.inf and oem*.pnf files in your %WINDIR%\inf directory (be careful in case some of those files are from someone else).
7. And you probably want to install the GPLPV drivers.

The GPLPV drivers will be getting an update soon that may make the process easier.  Right now the network drivers from Citrix enumerate as the same name as the GPLPV drivers.