Completing the add printer wizard hangs up.

Please specify the server OS, and if that happen when the printer is connected or not? you may check to do the opposite and see the result. Is the USB port working with other devices?

Win2003 Server, and it does not matter if the printer is on or off.

Try to disconnect(unplug the USB) cable and then add any printer

Then check the event viewer

I only deal with network printers. Local (USB) are not a problem.

If the network connection is good with other services then it is OS problem, check the event viewer and see what error messages it logs and post it; If the network is not stable then it may  the network card.

I know is a OS problem, I just can't find the fix any where.......
Thanks any way

Please check the event viewer and see what error messages it logs and post it

"Faulting application spoolsv.exe version 5.2.3790.3959, faulting module ntdll.dll, version 5.2.3790.3959, fault address 0x00010a5b"

Have no idea about that, but try to extract the file from OS CD, it might be corrupted or virus.

What is the Event ID: and Source for the event you listed above?

100 and 1000

Assuming that the Source on these is Application Error, have you tried disabling DEP (Data Execution Protection)?

See this Microsoft article for more information

http://support.microsoft.com/kb/875352