What would the registry key be for Windows 7. The following path exist:
C:\Users\UserName\AppData\Roaming\HP\Digital Imaging\Data\Destination
I modified the registry as you noted for Windows xp although I'm running Win7. At any rate, the change had no effect. I Cannot scan without an error message telling me that the HP Imaging device was not found. Under "Hide extended Error Information", it displays: 8,[(1,0,-2147024770)]