A Threat List update can fail because the connection is interrupted, Windows cannot validate a secure certificate, a proxy or security product blocks the updater, or the local installation needs repair. Do not rely on a stale Threat List for a high-risk scan.
Start with a clean retry
- Open Update and note the exact error.
- Confirm that normal HTTPS websites open in the browser.
- Restart Gridinsoft Anti-Malware and select Check now.
- If it still fails, restart Windows and try once more.
Check Windows and the connection
- Date and time: enable automatic time and time-zone settings, then synchronize the clock.
- VPN or proxy: verify the settings in Settings → Update. Temporarily test without a personal VPN or proxy, but do not bypass a company network policy.
- Firewall or antivirus: allow the signed Gridinsoft application and updater. Do not disable all protection permanently.
- Network: try another trusted connection if the current network uses filtering or a captive portal.
- Storage: make sure the Windows system drive has free space.
Repair the application
Run the current official installer as administrator to repair missing or damaged update components, then restart Windows. Download it only through the official installation guide.
Send the right diagnostics
If the update still fails, open Tools → Application logs and contact Support. Include the error text, time of failure, app and Windows versions, network type, proxy or VPN use, and the relevant log. Redact credentials and private proxy passwords.