Have you tried to verify that the Date and Time Settings on Your Computer Are Correct?
Because SSL certificates have an expiry date, if the date on your computer isn't correct, it may prevent you from connecting to secure sites. To verify that your computer is configured with the correct date and time settings:
Click Start > click Control Panel
Click Date, Time, Language, and Regional Options, and then click Date and Time
Select the Date & Time tab
Check to make sure that the date and time settings are configured to use the current date and time, and then click OK.
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