Solution for expired Win7 system security certificate

  

1. Press Win+R to open the run, enter “ldc;mmc”, click OK;

2. Select “File&rdquo in the console window ;--&“Add or delete management>;

3. Select “Certificate" in the Snap-in box, click Add;

4. In the account of the certificate management unit Select “My User Account”, click “Complete>;

5. Expand “Certificate-Current User" “Certificate”, find the certificate you need to delete, right-click and select Delete;

6. Re-open the website that requires the certificate, click “View Certificate”--“Install to Trusted Root Certificate Authority”

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