Hp printer 5550

Looks like I found the problem: The 5550's driver software (version 7.1) is apparently not compatible with XP SP2's "Data Execution Prevention" feature. Go to My Computer, right click & select Properties. Choose the Advanced panel. Click the first Settings button, in the Performance Section. Choose the Data Execution Prevention panel. Choose the first radio button, "Turn on DEP for essential Windows programs and services only", not the second one "Turn on DEP for all ...." The first radio button (essential programs only) was what was selected when I got the machine, but I myself had upped the setting to the more restrictive level. Longstride

Which operating system are you using? The printer driver might have become corrupted, so you should download the newest driver for your OS and install it; that MIGHT correct this problem for you... you mentioned installing the printer and software again, but if you didn't install the NEWEST version of the driver, that will be the FIRST step you must take as you try to correct this problem. I've seen both of your posts about this: http://www.fixya.com/support/t140419-hp_deskjet_5550_printer you've mentioned that "it prints fine using my desktop"... are you having these problems with a LAPTOP computer, or a different DESKTOP system? Which OS is installed on your DESKTOP computer, and which OS is installed on the defective system? These details can make a big difference in determining which steps we'll take as we try to correct this... As you can now see, we need you to provide more specific information about the problems you've encountered, and the computers you're using when you have problems... First off, are the error messages you're seeing being displayed on the computer MONITOR, or are they being displayed on the printer itself? Can you copy the EXACT error message(s) you're seeing, and post them here? The HP webpages for your printer offer a LOT of help, but without knowing more exact details about the error messages you're seeing, I can't offer better advice... Let us know which version of Windows you're using (WinME, WinXP, etc.) on the WORKING computer, and which version you're using on the computer which is having problems printing. If the printer works properly on one system, but NOT on a different computer, then there is probably NOTHING wrong with the PRINTER itself; you most likely have a problem with the COMPUTER you're trying to print from... Answer my questions when you can; provide DETAILS about the types of computers you're using, the method of attaching the printer to the computers, and the operating systems on each computer, along with the EXACT error messages you're seeing, and whether they are on the PRINTER itself, or on the computer monitor, and we should be able to help you resolve this... Good luck; this could be a SIMPLE problem, or it could be complicated, but we won't know until you provide the missing details...