I've had this problem also. I was installing on a Toshiba Satellite L455D.
The error on first startup is: "Error 1904.Module C:\Program Files\Common Files\ATI\Technologies\Multimedia\atimpenc.dll failed to register. HRESULT -2147220473."
I click OK and get the same message as above except with "atixcode.dll"
I click OK and it proceeds to finish starting Windows but pops up the warning: "The ATI Control Panel failed to initialize because no ATI driver is installed, or the ATI driver is not working properly. The ATI Control Panel will now exit." I have tried with both the old and new style ATI control panels.
Looking under Display Properties > Advanced > Adapter, all the information is listed as <unavailable>. Under the Device Manager I see a Display Adapter flagged with the yellow exclamation point thing - "ATI RADEON 3100 Graphics".
I can then manually install the ATI driver 8-8_xp32_dd_67975.exe and it all works fine, so I know the machine is okay.
I can provide more testing info if needed. Thanks for all your hard work in any case!
Last edited by needlestack (2012-03-13 06:16:25)