To fix the high Memory or CPU usage issue in Windows Push Notifications User Service on your Windows 11/10 PC, follow these instructions.

Are Push notifications not working for you in Windows 11/10? Follow this guide to fix WpnUserService.dll Errors on Windows 11/10.

Malware distributors are abusing a DLL hijacking vulnerability in Apple's Push Notification service Windows executable to install coin miners on users attempting to download copyrighted software.

Websites that want to push updates to Windows 8 tablets will be able to use the Windows Push Notification Service (WNS) to notify a tablet that an update has been received.