Device installer error : Windows could not load the installer for Display ?

[Think]

I use to have the x1900xtx and the x1900xt in crossfire mode but I've decided to remove them and sell them off but when I went to remove and install my old 1800 gto, I started to recieve this error:

Device installer error

Windows could not load the installer for Display. Contact your hardware vendor for assistance.

I removed ATI drivers from add/remove and ran Driver Cleaner Pro ( even in safe mode ) but in Device Manager, I still have exclamation marks on 2 Display adaptors that I cannot right click and unistall. Think there's some sort of DLL's lying around that I can't get rid of. The card works fine in my other rig so it's not the card.

[Eastcoasthandle]

You got your work cut out for you.

Use your uninstall program to delete the drivers
-DL/Install the lastest driver cleaner http://www.drivercleaner.net/
-DL/install the lastest Registry Mechanic http://www.pctools.com/registry-mechanic/
Side Note: When using registry mechanic options and check create a restore point... and scan files for suggested correction that is all.
OR
-DL/install the lastes Tune Up Utilities http://www.tune-up.com/
-DL/install the lastes ATI TOOL .25 beta 14 http://www.techpowerup.com/atitool/ --this will also help control fan speed
-Also download lastes SysTool http://www.techpowerup.com/systool/ --this will monitor both CPU/GPU Temps
-Uninstall your video card drivers using your uninstall program.
-reboot into Safe Mode with internet connection enabled
-use the search feature using (ATI*.* or Nvidia*.* if you had that card in the past). Use your curser and place it on the file to make sure it comes up as ATI Technologies, etc.
-Do not delete ATI files found in your cab. Most of the ATI files are found in Windows\system and windows\system32 sub directories. If they pop right back that's a good sign they are XP's version and that's ok.
-once they are deleted use driver cleaner to remove all ATI/Nvidia related entries, that means all of them not the ones you think are important. Just make sure you don't delete chipset and sound drivers that maybe related to ATI/Nvidia depending on what chipset you are using. So be careful, if you are not sure of what that particular program is good for:
stop, do a websearch, once you know what it is, return back to driver cleaner and make the appropriate selections. If you had both ATI and Nvidia in the past then look to delete both ATI and Nvidia entries.
-now use Registry Mechanic or Tune-Up utilities registry cleaner and look for any Nvidia, ATI drivers or both and remove them. Again make sure you don't remove chipset or sound driver registries. You are only looking for video card related entries.
-reboot to normal XP and install your drivers.

[Think]

Tried the above suggestions using registry mechanic, ccleaner and driver cleaner pro. Did a search for ATI * and removed what I found. Did the same thing in safemode.

When I try to right click and remove the display adaptors ( or try to update them to a generic drive ) the same error occurs each and everytime. When I try to install drivers ( even and older version ) the same error occurs.

Did a manual search for Radeon in regedit and remove what I found as well but i still get this error:

"Windows could load the installer for Display. Contact your hardware vendor for assistance"

[Eastcoasthandle]

hmmm try to re download the program. It could be corrupt...

[Think]

The cleaner programs work fine but I downloaded them anyway since the ccleaner had an updated version. Same problem.

:(

I so do not like reinstalling the OS to solve problems. I'm rather a sleuth at heart and would like to solve this before I give up to it.

[Eastcoasthandle]

The cleaner programs work fine but I downloaded them anyway since the ccleaner had an updated version. Same problem.

:(

I so do not like reinstalling the OS to solve problems. I'm rather a sleuth at heart and would like to solve this before I give up to it.
No, no I meant the cat (the program giving you the error message). It maybe corrupt.

[Think]

I did that as well. BTW, thanks for your suggestions thus far:)

[Think]

bump:(