clnotifications
clnotifications is a Windows utility that cleans up excessive Windows Push Notification Platform (WPN) and Windows Notification Facility (WNF) values from the registry key HKEYLOCALMACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Notifications. Over time, this key can accumulate thousands of stale entries due to leaked WNF registrations, causing explorer.exe and frxsvc.exe to read massive numbers of values during user logon, resulting in high CPU usage and slow sign-in times. By default, clnotifications skips the first 500 values and removes the rest, with logs saved to the same directory as the executable. It offers configurable parameters for chunk size, read iteration count, and skip count. The tool is particularly useful for Windows Server 2019 environments where Microsoft has not provided an official fix, and it addresses issues documented by Microsoft regarding registry bloat on Windows 8.1 and related platforms.