I drove myself nuts trying to figure this out today, wasting way too much time tinkering. Bottom line: to get my photos off a newly acquired Powershot A1000is, I had to play sneakernet, taking out the SD card and plugging it into the PC. None of the helpful tips on the formal help pages or other forums got me out of this fix. The odd thing is that I have two earlier Powershots -- an A530 and an A590is -- and using the same exact hookup they do get recognized by Windows. There was no special driver or software involved in any of these transactions. Any ideas?