I just started getting the problem. Can't open my scanner or print and get the wiaaut.dll problem. Tried to activate the dll via Task Manager, Services, Services tab but get "Error: The dependency service or group failed to start" message. Looked at the dependencies for wiaaut.dll under properties and couldn't find anything wrong. Also tried to just reinstall the whole Paint.net program to no avail. Help anyone? I'm running Windows 7, 64 bit.
Dwayne