Consider the following scenario:

• You use the Data Collector Sets feature in Performance Monitor (Perfmon.exe) to collect data.
• In the Properties dialog box of a data collector set, you set a value in the Maximum Size field that is located on the Stop Condition tab. For example, you set a value of 30 megabytes (MB).
• In the Properties dialog box of a created data collector that is in the data collector set, you select Comma Separated or Tab Separated in the Log format list.
• You use Performance Monitor to collect performance counters and to save them to a log file.

In this scenario, the maximum file size limit that you set in the Maximum Size field does not work. Therefore, the log file size keeps growing over the maximum file size limit.

You have a computer which supports two monitors and have them configured for “clone” mode, and you do not have the display configured to use Windows Aero. When playing a DVD movie, an artifact called “tearing” may appear on the secondary monitor. Tearing is a video artifact in which the top portion of the screen shows a different frame of video than the bottom portion. During scenes containing fast motion, there may be a noticeable horizontal line at the point where the two frames meet.

You have a computer which supports two monitors and have them configured for “clone” mode, and you do not have the display configured to use Windows Aero. When playing a DVD movie, an artifact called “tearing” may appear on the secondary monitor. Tearing is a video artifact in which the top portion of the screen shows a different frame of video than the bottom portion. During scenes containing fast motion, there may be a noticeable horizontal line at the point where the two frames meet.

Unexpected behavior occurs after monitor cable disconnected during DVD playback in Windows Media Player.

When you disconnect the monitor cable during DVD playback in Windows Media Player, you may experience any of the following symptoms:

• Windows Media Player may terminate abnormally.
• Windows Media Player may stop responding.
• The video may be scrambled during playback.

After undocking or removing a second monitor on a Windows Vista based computer, custom toolbars set to “Autohide” will be transparent and blank.

You may see a blank screen upon log-in if you have disconnected one of multiple monitors while the system was locked in screen saver mode

Your computer is set up to use multiple monitors, and you want to change it to use a single monitor.

Consider the following scenario on a Windows Vista Tablet PC-based computer:

• You extend the desktop to an external monitor.
• You set the external monitor as the main monitor.
• You shut down the Windows Vista Tablet PC-based computer.
• You detach the external monitor from the Windows Vista Tablet PC-based computer.

In this scenario, when you restart the operating system, and you use the built-in monitor, you may find that the tablet pen does not work.

Consider the following scenario:

• You connect an external monitor to a portable computer that is running Windows Vista.
• You disable the portable computer’s built-in display.
• The portable computer turns off the external monitor because of the lack of user activity.
• You disconnect the external monitor, and then you resume the portable computer.
• The portable computer’s built-in display turns on.
• You reconnect the external monitor.

In this scenario, the external monitor displays a black screen.

Considering the following scenario:

• You have a Windows Vista-based or Windows Server 2008-based portable computer that is connected to an external monitor.
• You set the external monitor as the main monitor.
• The external monitor has a screen resolution that differs from the portable computer’s built-in monitor.
• You put the portable computer into sleep or in hibernation.
• You remove the external monitor.

In this scenario, when you wake the portable computer, the logon screen is not resized correctly. For example, the logon window may be smaller or larger than the screen on the portable computer.