Network · medium

How to fix Secure connection (SSL) error

Error code: ERR-SSL-PROTOCOL-ERR

What this error means

The browser refuses to load the web page due to an HTTPS/SSL error. Typical causes include the date and time are incorrectly set on the computer, anti-virus programs (e.g. ESET, Avast) scan SSL transmission poorly and outdated operating system without root certificates.

Updated

Before you begin

Save open work and back up important files. Use instructions for your exact device and software version. If Windows cannot start, see the startup guide.

Work through these checks

0 of 3 complete
01Synchronize time in Windows (NTP)
  1. Synchronize time in Windows (NTP)
What to expect

Check whether the original symptom still occurs.

If it does not help

Continue only if this check applies to your device. Consult its manufacturer if you are unsure.

Browse related errors
02Turn off 'HTTPS Scan' in the antivirus
  1. Turn off 'HTTPS Scan' in the antivirus
What to expect

Check whether the original symptom still occurs.

If it does not help

Continue only if this check applies to your device. Consult its manufacturer if you are unsure.

Browse related errors
03Try clearing your browser's cache and cookies
  1. Try clearing your browser's cache and cookies
What to expect

Check whether the original symptom still occurs.

If it does not help

Continue only if this check applies to your device. Consult its manufacturer if you are unsure.

Browse related errors

Possible causes

  • The date and time are incorrectly set on the computer
  • Anti-virus programs (e.g. ESET, Avast) scan SSL transmission poorly
  • Outdated operating system without root certificates