Net Uptime Monitor (often abbreviated as NUM) is a lightweight utility designed to provide a comprehensive report of your internet connection's uptime. Unlike speed-testing tools that measure bandwidth, Net Uptime Monitor focuses on , helping you identify the exact times and lengths of any connection failures.
| Error Message | Likely Cause | Solution | |---------------|---------------|----------| | "License key has been revoked" | Key was refunded or flagged as stolen | Contact vendor support with proof of purchase | | "Invalid hardware ID" | You changed CPU, motherboard, or network adapter | Request a hardware reset from vendor | | "License server unreachable" | Firewall blocking outbound port 443 or 8080 | Whitelist vendor's domain in firewall | | "Key format invalid" | Copy-paste error or wrong version | Manually retype key, verify version compatibility | net+uptime+monitor+license+key+updated
If purchasing a license is not an option, consider using free, open-source network monitoring tools. These alternatives offer robust features without licensing compliance risks. PingPlotter (Free Tier) Net Uptime Monitor (often abbreviated as NUM) is