Continually getting https Certificate Errors on all browsers

Solution 1:

Your problem might be that your new computer is missing some root certification authority (CA) certificates.

See this article: Windows root certificate program members

where you can manually download and install all third-party root certificates that are distributed via the Windows Root Certificate Program.

Solution 2:

Be sure that the date of your computer is accurate.

A dead CMOS battery might reset the date to the early 2000 every time the computer boots which will prevent a certificate from being valid, since they have an expiration date and a validity date.