Consider the following scenario:

• You have a Windows Server 2008-based print server.
• This print server has many Windows Vista-based printer clients.

In this scenario, the memory usage of the Print Spooler service increases over time. For example, assume that you have several thousand printer clients that connect to the print server. Eventually, the print server becomes unresponsive, and you must restart the server to recover from this problem.

Consider the following scenario. You are running a Windows Vista-based computer. On this computer, you install a Web Services for Devices (WSD) printer. However, about 30 minutes after you install the WSD printer driver, the Print Spooler process (Spoolsv.exe) crashes.

In Windows Vista, when you restart a printer after you change its device configuration, the changes are not applied until the Print Spooler service restarts. For example, the changes are not applied until the computer restarts.

This problem occurs if the printer driver is based on Web Services on Devices (WSD). This problem occurs only if you make the changes while the printer is turned off.