NET::ERR_CERT_DATE_INVALID Error on All Sites

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  1. Win + r. and type “certmgr.msc”
  2. Then, delete 3 items :
    R3 Certificate and DST ROOT CA X3

To delete, just win + r “certmgr.msc” then go thru :

  1. Trusted Root Certification Authorities > Certificates
  2. Intermediate Certification Authorities > Certificates
  3. Third-party root Certification Authorities > Certificates

Right click, and press delete

To locate the right certificate :
Just use Issued By and Expiration Date, search for certificate issued by DST ROOT CA X3, and expired around 29-30 sept 2021.

  1. Install new certificate :
    Download this : https://letsencrypt.org/certs/isrgrootx1.der
    Double click it.
    Then, Choose Local Machine, Next
    Choose Place all Certificates in the following store, and then choose “Trusted Root Certification Authorities” folder
  2. Restart your PC
    Can find more ways to fix NET::ERR_CERT_DATE_INVALID error.
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