Q: Certificate Not Valid Error - Certificate Test Fails

Context

• Running Avast anti-virus/security software
• Obtained certificate manually or with Certaid with no error messages/obvious issues
• Certificate Test fails
• Certificate not valid error

Avast software (provided by some vendors with new hardware as well as for stand-alone purchase) can cause MIT Certificates to silently fail when being installed due to how Avast secures your local keychain (identity data storage) information.

Solution

1. Turn off or uninstall Avast.
2. Obtain certificates. IS&T strongly recommends using Certaid.
3. Install Sophos Anti-Virus or turn back on Avast to protect your computer.

IS&T Strongly recommends uninstalling any vendor-provided or third party security/anti-virus software and installing Sophos Anti-Virus. It is FREE to the MIT Community and has been tested with with MIT licensed software and services.

See Also

• Certificates Landing Page