Windows 7/64 Can anyone explain why sometimes my printer drivers fail to load on startup. In the "Devices and Printers" when they show all works fine then the next time I bootup -nothing appears. My printers Canon 4200/HP 7510e wireless I seem to think this started when I bought the HP ? but not sure. When they fail to load and I try to print the message "Print spooler file isn't working" I have deleted and reinstalled the drivers without success. Any help much appreciated.