Continually getting https Certificate Errors on all browsers

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.

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.

Had the same problem on Windows 7 where any secure website would give an invalid certificate error message in any browser for Chrome, IE, and Firefox.

As a solution, I found the Browser Safeguard in my programs and deleted. No problems after that.