[Xen-users] Unable to remove GPLPV drivers without breaking win2k3 domU

[Andy Burns <lists.xensource.com@xxxxxxxxxxxxxx>]

I have a Win2K3 domU (and thankfully an image backup of the LVM volume 
that holds its system disk) I previously installed GPLPV v0.8.9 drivers, 
the domU boots OK with or without the /GPLPV switch in boot.ini, however 
with the /GPLPV switch it tries and fails to use the Xen network driver, 
and so the machine is network-less, so for the past few months I've left 
it using pure HVM instead of PV drivers.
Now I'd like to try the 0.9.11-pre4 drivers

attempt 1 - installed new drivers over the top of the old ones, got 
bluescreen at next boot.
attempt 2 - restored disk and used the un-install.bat from the old 
version, still bluescreen at next boot.
attempt 3 - manually uninstalled all xen devices from within device 
manager, deleted all relevant .inf/.pnf/.sys files, it still 
bluescreens, I think it's a STOP 0x0000007B
Any more suggestions on how to remove the old drivers and keep it 
bootable, ready to try the newer version?
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