Problem reverting to older driver

[LordJuanlo]

I reinstalled Vista a couple of months ago, with official Catalyst 8.9. When the 8.10 were released, did a simple uninstall of the 8.9 and installed 8.10 fine. After this, I uninstalled 8.10 and installed the hotfix. And last week I uninstalled the hotfix to install the 8.11.

Now I want to install the 8.11 hotfix to see if it fixes problems with Lord of the Rings Online, so I have uninstalled the 8.11. But after installing the 8.11 hotfix and rebooting, I get a message saying that "no ATI driver has been installed". On device manager I see two 4870x2 cards with the exclamation mark. I have uninstalled and rebooted several times, but it does not work.

I have installed official 8.11 again and it works, but I have no idea why the hotfix won't install. That's the reason why I reinstalled Vista, because I tried to revert to an old driver after installing official Catalyst 8.8 and had that same problem. I thought it was because of the uninstalled nVidia card or after trying DriverSweeper.

However now it's a clean install with only two Catalyst drivers installed, and uninstalled via ATI uninstaller.

Any ideas?

[Viral]

Could be a problem with the driver install file, try downloading it again. If not then a conflict with the driver and something in your system?

[grey_1]

I've read several posts around different forums saying the fix is to manually delete any left over files after uninstall. No one seems to know why that happens, but some have had trouble with other driver versions also.

I've been lucky so far.

*knocks on wood*

[Heinz68]

GAR at ExtremeSystems (http://www.xtremesystems.org/forums/showpost.php?p=3441225&postcount=11) looks like had same problem like LoardJuanlo and here is how he solved it.
got the drivers to install with some help from a member of techpowerup, drivers seem to be better than the official 8.11's, keepers for me till 8.12, if you have problems installing, follow these instructions.

You need to use the driver cleaner and then go into the documentandsettings/app data which is hidden by deafault and then local/ delete ati, then instead of local this time go into roaming and delete ati. Then go into reg edit and what is it local machine , ahh just go into each main branch and delete the ati and amd from the software branches and ATI also leaves behind an ati folder in the program files with all this deleted you shouldn't have an issue after a reboot.

Not sure if the Driver Cleaner had to be used since he was also deleting all the ATI/AMD registry and files manually.

[LordJuanlo]

Thanks Heinz, will try when I get home, but I won't use any drivercleaner, I think with ATI software those programs can create a real mess

[LordJuanlo]

It worked, thank you very much for the link

[Heinz68]

Good, I'm happy you had it solved. I also never use the DriverCleaner.