I have a canon d646u scanner. I've been using it with my windows vista computer, and there were no problems except for the fact that it was displaying things in portugese instead of english. So I decided to reinstall the drivers and scanner software to remedy this. However, I can't reinstall the twain driver - searching the internet and Canon website yields the grim message that there are no twain drivers for this scanner model for vista.
This makes no sense to me. I installed it just fine before. I've scanned plenty of images with it.
Any help would be greatly appreciated.