Windows 7 64bit
I had the same problem with odin not finding the phone and then I ended up getting the exclamation in between a phone and pc logo "brick" screen, however I ended up taking my recently installed windows 7 64bit system and putting 32 bit on the pc once I did that I went by the first page download the 32 bit drivers and odin and then removed battery and sim I plugged phone in and held down both volume up and down and then inserted the battery it was seen immediately and allowed me to flash stock captivate. My phone is now stock like day one I will say that I then tried updating over the air to update-1 and it failed at 50%... So moral of the story is windows 7 64bit seems to be the culprit in all of this.
I had the same problem with odin not finding the phone and then I ended up getting the exclamation in between a phone and pc logo "brick" screen, however I ended up taking my recently installed windows 7 64bit system and putting 32 bit on the pc once I did that I went by the first page download the 32 bit drivers and odin and then removed battery and sim I plugged phone in and held down both volume up and down and then inserted the battery it was seen immediately and allowed me to flash stock captivate. My phone is now stock like day one I will say that I then tried updating over the air to update-1 and it failed at 50%... So moral of the story is windows 7 64bit seems to be the culprit in all of this.