Thanks for the suggestion Novak, The problem persists even in Safe Mode. Typical of this issue, it copied about 2000 of 15,000 photos, then halted on a 712 KB file. A "Copy File" dialog pops up with the following text: "An unexpected error is keeping you from copying the file. If you continue to receive this error, you can use the error code to search for help with this problem. "Error 0x8007046a: Not enough server storage is available to process this command." So does this suggest it's a Windows 7 problem, not 3rd party drivers? Thanks, Ken.C