Match the symptom, then work through the safe checks.
1. What best matches what you observe?
2. Complete only the checks that are safe for you.
Show stop conditions
- The warning appears on a payment, banking, email, or identity site
- The certificate name does not match the site you intended to visit
- The browser or security software reports active interception
Likely causes
- The device date or time is wrong
- The website certificate is expired, mismatched, or incomplete
- A hotel, café, school, or workplace network is intercepting the connection
- Security software or a malicious network is inspecting encrypted traffic
Quick checks, in order
Check date, time, and time zone
Certificate validation depends on an accurate system clock.
Try the official site address directly
Avoid following shortened or unexpected links.
Complete the Wi-Fi sign-in page
Open a plain website on public Wi-Fi to trigger its captive portal.
Do not bypass warnings on sensitive sites
Stop for banking, email, identity, health, or payment pages.
Where does the warning appear?
The site certificate or hostname is the likely focus.
Check the clock, network interception, antivirus HTTPS scanning, and captive portal.
Complete network sign-in or leave the network if the warning remains.
Stop and get qualified help when
- The warning appears on a payment, banking, email, or identity site
- The certificate name does not match the site you intended to visit
- The browser or security software reports active interception
Official support and model manuals
Use the full model number from the rating label. The manufacturer manual is the deciding reference when codes differ by region or product family.
Frequently asked questions
Is it safe to click Advanced and continue?
Not for sensitive activity. The warning means Chrome cannot establish trusted identity for the encrypted connection.
Can a wrong clock cause the warning?
Yes. A significantly wrong date or time can make a valid certificate appear expired or not yet valid.