The systray, also known as the system tray, is the area on the taskbar in Windows where system icons, such as the clock and volume control, are located. The default location of the systray is typically at the bottom right corner of the taskbar, next to the clock.

The systray is a feature in Windows that allows users to quickly access system settings and notifications without having to navigate through the control panel or settings app. It contains icons for system functions such as network connectivity, power options, and volume control. It also displays icons for running background applications such as antivirus software, cloud storage apps, and messaging apps.

Users can also customize which icons are displayed in the systray. For example, if an icon is not frequently used, it can be hidden from the systray to declutter the taskbar. Additionally, if an icon is hidden, the user can still access its settings by clicking the upward arrow on the taskbar, which will display all hidden icons.

It's also possible to change the location of the systray. For example, if the user prefers to have it on the left side of the taskbar, they can move it there. This can be done by right-clicking on the taskbar, selecting 'Taskbar Settings' and then 'Select which icons appear on the taskbar' and choosing the icons you want to show on the taskbar.

In summary, the default location of the Windows systray is at the bottom right corner of the taskbar. But users can customize it to their preferences, by hiding or showing icons, and also moving them to a different location on the taskbar.