Consider the following scenario. You use a Windows Vista-based computer to print documents on a shared printer that is hosted by a Windows Server 2008-based print server or by a Windows Server 2003-based print server. Additionally, one of the following conditions is true:

• An administrator installed an additional printer on the print server.
• An administrator updated a printer driver for another printer on the print server.
• System files that are used directly by the print drivers, such as unidrv.dll or pscript5.dll, are updated on the print server.

In this scenario, you receive the following message:

To use \\Print_Server\Printer, you need to install the printer driver on your computer and then restart the print job. If you do not recognize or trust the name and location of the printer, do not install the driver.

Also, Driver Update Needed is displayed in the Status field in the Printers folder in Control Panel.

If you click Install driver, and you have administrator user rights, you can continue to print.