Automatically check for player updates (once a week)
When enabled, Zoom Player will check if the latest version is installed on your computer. If the current version is outdated, you will be presented with an option to download the latest version.

Allow Multiple Instances (allow more than one instance of the player to run at the same time)
By default, Zoom Player will only execute once. Trying to open a second Zoom Player instance will bring previously running instance into focus. Enabling multiple instances enables you to run more than one copy Zoom Player at a time. A negative side-effect occurs when opening a new file from an external source (double clicking in explorer for example). In such cases, a new instance of Zoom Player is executed instead of loading the new content in the previously open instance.

Zoom Player provides other ways to run multiple instances, including separate configurations running at the same time, click here for more information.

Disable CD / DVD Auto-Run (prevents applications on the disc from auto-starting)
Zoom Player can disable a CD's or DVD's Auto-Run capability (as some CD/DVD discs can automatically run an application when they are inserted for the first time). Having a disc auto-run an application can be problematic when all you want to do is play the disc's content. Zoom Player must be the focused application for this feature to function.

Forcibly hide the Windows Taskbar in Fullscreen / Zoom mode (can cause focus issues)
In very rare circumstances, you may want to hide the windows taskbar when playing fullscreen video. Please note that windows doesn't react too well when you hide its task bar (it can cause problems switching between windows using Alt+"TAB", which can only fixed after a reboot).

Help us improve by anonymously sharing usage statistics
This setting helps us get anonymous usage information (version of Zoom Player and Windows you're running, other hardware elements which affect media playback, etc). The information is sent out once a week and doesn't contain any personal-identifying data. We value your privacy.

Enable External Control Message Server (required by some third party applications)
Third party applications may need to communication with Zoom Player through the Microsoft "SendMessage" API. This checkbox controls whether to allow third party applications access.

Save configuration to a local file (instead of the Windows Registry, may slightly slow initial load)
When enabled, Zoom Player saves its configuration data to a file ("zplayer.local" in the Zoom Player data folder) instead of the System Registry. This can slightly slow down Zoom Player's loading (under 1 second), but makes it easier to run different configurations of Zoom Player in different folders and to backup/migrate Zoom Player.

Adjust dialog sizes based on monitor resolution
Increase some of the dialog sizes based on the monitor's current resolution (makes the dialogs easier to use on 4K and higher resolution screens).

Enable Control Web Server (port)
Zoom Player can be controlled remotely through any web browser by using the Web Server control. Once enabled, you open the Zoom Player control server by entering your computer's URL or IP number with the specified port in any web browser, for example:

The Zoom Player control server serves the browser an HTML script file located under "Zoom Player\WebServer\index.html". A sample file is provided along with a default 480x848 remote control layout. Standard, Extended and Navigation Zoom Player functions can be executed through the control web server. Click here for the complete Zoom Player function list.

Enable External TCP Control (port)
Beyond supporting microsoft's "SendMessage" API. Zoom Player provides a very powerful Communication and Control API that works through TCP/IP (the underlying protocol used by the internet itself). This API provides external communication and control over Zoom Player (over the internet or a local network). For more information on Zoom Player's Communication and Control API, visit the Third Party Enhancements sub-forum.
A sample application (written in Delphi and includes sources) demonstrating the usage of the Zoom Player TCP/IP interface can be found here.

Fullscreen / Zoom to Monitor
This setting selects a specific monitor Zoom Player should switch to when entering fullscreen/zoom mode. By default this is the monitor the Zoom Player window resides in.

Default CD, DVD or Blu-Ray Drive letter
The specified drive is the first drive Zoom Player looks for when you press play in DVD mode. If no content is found on the specified drive, Zoom Player quickly scans other drives for CD, DVD or BluRay content.

Player Thread Priority
Each windows application has a Thread Priority. The thread priority lets windows know which application gets more (or less) CPU power available to it. Think of it as a pie, each application gets a slice of the pie. The thread priority controls the size of the slice. It is not recommended to use a thread priority greater than "Above Normal" or it may have a negative impact on system stability (especially when loading badly corrupted media files). Set the Thread Priority to "Above Normal" in situations where you're running applications in the background and you don't want the media playback experience to suffer (dropped frames, audio going out of synch, etc).

Taskbar icon
Select the icon to be used as the player's taskbar icon.
Please note that if the windows taskbar is set to 'Combine Buttons', this setting will not work.