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What error message precisely, do you get when you try to install the Lexmark printer in question?
Does the error message mention any files, if so, which ones?
What is your computer, a Windows PC or an Apple computer?
Which version of Windows (or MAC OS X ) is on it?
(If a Windows PC, what is its System Type? either 32-bit or 64-bit, and found inStart - Control Panel - System and Security - System .)