I have three printers connected to this computer. My default is a Panasonic KX-P4400 and suddenly when I tried to print to it today, I keep getting an error. It's a USB connection. I deleted the printer and re-installed it again with no luck. My other Panasonic KX-P7100 is a serial connection and I get the same error. I can print to my colour printer which is a Epson Stylus with a USB connection. I know that there is no a problem with the connection because as soon as I turn on the printer I can see it on my task bar. At first I thought it was a problem with spooling but yet I can still print to my colour printer. The only thing I installed recently was  ZoneAlarm firewall. Could that possibly be the problem?What error do you receive when you try to print?I don't get any errors on my printers but after about 35 secs. I get an error on the computer that the job failed to print. I'm going to hook up ONE of my printers to my laptop to see if I can get it to print there. I am so stupid. I can't believe I did this. I was selecting the printer that was off each  time. They SAY so many brain cells die each day but I think they all died yesterday.  Consider this one solved. ThanksShame on you!   

I, of course, NEVER MAKE mistakes like this!  Never!   

ALWAYS glad to see a fix.   Good WORK tracking down the issue...and Yes we've all probably done this.