To fix random keys being pressed on a Dell wireless keyboard, try using an external USB keyboard.
If the issue persists, it may be a hardware problem in the laptop keyboard.
To troubleshoot, boot into the BIOS and Windows SafeMode and test the keyboard.
If the issue is still not resolved, replacing the keyboard may be the best option.
If the issue is caused by a problem with the multimedia keys panel, restoring to a date prior to the problem and reinstalling the Chipset driver, video driver, and running sfc/scannow in a Command Box may help.
If the keyboard module itself is broken, replacing the keyboard may be more cost-effective than repairing it.
To rule out hardware issues, disconnect and reconnect the keyboard, update the keyboard driver, run the Windows Keyboard Troubleshooter, and tweak the keyboard settings.
Try using an external USB keyboard. If the external one has no problem, then likely a hardware problem in the laptop keyboard. Boot into the BIOS and in Windows SafeMode and test the keyboard. If still not working, you can replace the keyboard.
Solved: Keyboard Keys Automatic Pressing - Dell Community
This forum post discusses a Dell Inspiron 1501 laptop that is experiencing a stuck key detected even with the keyboard removed. The problem is believed to be caused by a problem with the multimedia keys panel, which communicates on the same interface as the keyboard, sending out random signals. The post also suggests trying to restore to a date prior to the problem, such as doing an F12 at the boot and doing the extended Dell Diagnostics, reinstalling the Chipset driver, reinstalling the video driver, and running sfc/scannow in a Command Box, and a repair install of the OS.
Solved: Stuck Key Detected - even with keyboard removed!! - Dell Community
Kristina and her laptop's built-in keyboard are having issues with some keys not working, leading to frustration and difficulty using the touch screen. After troubleshooting, it was determined that the keyboard module itself was broken and connected to pin 16 on the keyboard connector. It is recommended to replace the keyboard with a new one, as it may be more cost-effective than repairing it.
Solved: Keys not working on built in keyboard on my Inspiron 11 - Dell Community