Scroll down to Code 38 and follow Microsoft's advice.
See where that takes you.
I bought a Powershot A85.
I have tried by all means to connect it to my PC but no luck.
I get en error message saying there is another instance of the driver in the memnory (CODE 38) and no matter what I tried nothing seems to work.
I downloaded WIA 6.2.5 but it cannot be upsated and it did not help at all.