Recently installed WindowsXP. Unable to print from either two printers now. I have HP Office Jet 720 (all-in-one) and Lexmark Z45 printers. The 720 was printing at first until I tried to scan a document. Neither printer prints now. I downloaded a driver from HP compatible with XP and I also went out and purchased an IEE 284 cable. I uninstalled both printer's softwares and reinstalled them again. When I try to print from any software to either printer, I get an error communication message. The 720 shows on the spool that it is printing, but just a blank page comes out and nothing prints. The Lexmark just shows the communicaton message. Is there anything that I was supposed to do with the printers after installing XP? Do I have to configure the printers, etc. Can anyone help with problem. I am ready to go out and buy a printer compatible with XP, but cannot afford one right now.