I'm trying to install the google-adb-drivers.zip file (obtained here) on a Windows 7 64-bit system. The phone is the Nexus S 9020T. USB connectivity works correctly for file transfer mode. When I enable debugging, I expect to see "Nexus" appear under "Other Devices" in Device Manager, but it doesn't. After checking USB Debugging under "Developer Options" in the phone, the computer makes the USB disconnected sound.
I was able to load the drivers on a different Windows 7 32-bit system, but that's not the system I want to use.
Why is the debugging port not being recognized on the 64 bit system?
I saw the other post with a link to download the SDK, but I also would like to avoid installing the entire SDK unless absolutely necessary.