I am using Windows Vista Home Premium. I am having trouble with my printer, although it worked perfectly well uintil Wednesday evening, when I printed an email. I didn't use it on Thursday, but yestwerday Friday 13th I was unable to print a simple email, a message about possible firewall problem, which I didn't understand. I am not very computer literate, such jargon is no good to me. Following a Readers Digest Manual for Vista, I uninstalled my printer, now I can't get it installed again - the message 'Printer installation failed, operation could not be completed (error 0x00000643)' came up, which is gobbledegook to me - why can't computers use plain English?! Please help!