| System | 35 | Information | Time service is synchronizing system time with a time source |
| System | 36 | Warning | Time service unable to synchronize system time for an extended period |
| System | 37 | Warning | Time service stopped advertising as a time source |
| System | 38 | Information | Time service started advertising as a reliable time source |
| System | 47 | Warning | No valid response received from manually configured peers |
| System | 48 | Warning | No valid response received from domain peers |
| System | 49 | Warning | Time difference between local and peer exceeds acceptable threshold |
| System | 50 | Error | Time difference too large for correction |
| System | 51 | Information | Time synchronized with the configured NTP source |
| System | 52 | Error | Error communicating with an NTP source |
| System | 53 | Warning | Invalid time data packet detected from peer |
| System | 54 | Information | NtpClient resolved peer name to IP successfully |
| System | 55 | Warning | DNS lookup for peer failed |
| System | 57 | Error | NtpServer failed to send time data to clients |
| System | 58 | Information | NtpServer started providing time to clients |
| System | 59 | Warning | NtpServer stopped providing time to clients |
| Microsoft-Windows-Time-Service/Operational | 2001 | Information | Time service started successfully |
| Microsoft-Windows-Time-Service/Operational | 2002 | Information | Time service stopped |
| Microsoft-Windows-Time-Service/Operational | 2003 | Error | Time service failed to start |
| Microsoft-Windows-Time-Service/Operational | 2010 | Information | Time service configuration changed |
| Microsoft-Windows-Time-Service/Operational | 2020 | Error | NtpClient communication error |
| Microsoft-Windows-Time-Service/Operational | 2030 | Warning | NtpServer configuration or permission issue |
| Microsoft-Windows-Time-Service/Operational | 2040 | Information | Time synchronization completed successfully |
| Microsoft-Windows-Time-Service/Operational | 2041 | Error | Time synchronization failed |
| Microsoft-Windows-Time-Service/Operational | 2050 | Information | System clock adjusted successfully |
| Microsoft-Windows-Time-Service/Operational | 2051 | Error | System clock adjustment failed |
| Microsoft-Windows-Time-Service/Operational | 36 | High | Time service synchronization failed |
| Microsoft-Windows-Time-Service/Operational | 47 | High | NtpClient received no valid response |
| Microsoft-Windows-Time-Service/Operational | 50 | Medium | Time synchronization drift too high |
| Microsoft-Windows-Time-Service/Operational | 111 | Critical | Time service stopped unexpectedly |
| System | 7009 | High | Timeout waiting for time service to start |