[jawest71]

This morning an automatic update to windows took place. Since then my wireless lexmark X4550 all in one printer has stayed resolutely off line. If I try to run it as administrator and click 'run online' I get a message 'arguments invalid' What has happened and has anyone else had the same problem. The update was Security update KB950582

[jawest71]

re configured printer, first as usb then wireless using wireless configuration utility which comes with printer and now all ok. what caused it, though, a mystery.

[TheShooter93]

It was probably just the fact that your printer ran on the old version of Vista ( prior to the update) and now needed to be reconfigured. That simple. Hope this helps.