Mouse cursor keeps vanishing on Windows 11

touchscreen laptop? after you tap the screen with a finger windows hides the pointer until you move the mouse again, which looks like it vanished. if it's a wireless mouse, low battery does it too, and so does the receiver being in a back port behind a metal case. move it to a front port and see.

When does it disappear - while you're typing, or randomly? If it's while typing, that's a setting: Control Panel > Mouse > Pointer Options, untick Hide pointer while typing. Randomly on a laptop, the touchpad may be getting toggled off by a function key. With two monitors it's often just slid off onto the other screen. In Pointer Options you can also tick Show location of pointer when I press the CTRL key, which helps find it. If none of that fits, update the graphics driver.