how to fix the site's security certificate has expired?
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['Double-click on the time in the lower right corner on the Taskbar, select “Date and time settings“.', 'Ensure the time, date, and time zone are set correctly.']
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['Delete your browser cache.', "Use the game's .exe file.", 'Delete the SSL certificate.', 'Try visiting a non-encrypted version of the website.', 'Disable HTTPS Everywhere extension.']
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and clear your web browser's cache to make sure you have the latest version of the website. If you have recently installed a new firewall program, browser extension/add-on or Internet security software that might be causing problems with the website, try disabling it temporarily.
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Security Certificate Warning in Microsoft Outlook. This hard to understand error means the security certificate your email server is using has expired or is invalid for other reasons. ... If you are the administrator, you need to install an updated certificate; if you are an end-user, you need to speak to your admin.
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['1 Verify the Date and Time in Windows. Security certificates are used by our web browsers and computers to make sure a particular site is safe. ... ', '2 Clear Internet Cache and History. Open Internet Explorer. ... ', '3 Security-Related Settings. Open Internet Explorer. ... ', '4 Try the Webpage Again.']
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SSL certificates are installed in LocalMachine\Personal. If you don't see any certificates there, then you don't have SSL certificate installed.
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['Launch Internet Information Services Manager (Start > Administrative Tools >> Internet Information Services (IIS) Manager), and choose the server the certificate should be imported on.', 'Double-click Server Certificates in the center menu.', 'Click the Import button in the right-side menu:']
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Every certificate has a built-in expiration date. In Exchange Server, the default self-signed certificate that's installed on the Exchange server expires 5 years after Exchange was installed on the server. You can use the Exchange admin center (EAC) or the Exchange Management Shell to renew Exchange certificates.
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['Clear browser cache, history and cookies.', 'Reset Chrome browser settings.', 'Reset Wi-Fi Modem.', 'Restart DNS client.', 'Change IPv4 DNS Address.', 'Disable "Experimental QUIC protocol" flag.', 'Changing maximum allowed TLS version.', 'Reset the Chrome profile Sync.']
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Update Chrome and your operating system: Sometimes an SSL certificate error can simply be due to using an outdated version of Chrome. To make sure yours is up-to-date, click on the menu. If you have an old version of the browser, you will see an “Update Google Chrome” option.
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The problem is exactly what it says on the tin: the authentication servers are down for maintenance. This generally means that they've had to get the servers off the line so they can make improvement work to it. There's nothing that anyone else can do about it until the servers come back online.
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Start regedit (Start menu/Run) and look at the certificate in the registry. It should be under HKEY_LOCAL_MACHINE or HKEY_LOCAL_USER, then SOFTWARE\Microsoft\SystemCertificates\My\Certificates.
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['Open Internet Explorer.', 'Click on “Tools” on the toolbar and select “Internet Options”. ... ', 'Select the “Content” tab.', 'Click the “Certificates” button. ... ', 'In the “Certificate Import Wizard” window, click the “Next” button to start the wizard.', 'Click the “Browse…” button.']
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['Go to the Firefox menu and click on Options.', 'Now, click on the Advanced tab and then click on Encryption.', 'Uncheck Use SSL 3.0 and Use TLS 1.0 instead.', 'Once done click on the OK button and restart Firefox.']
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When Internet Explorer reports the message "The certificate has expired or is not yet valid:" it is very likely caused by the fact that the system date and time have not been setup. ... To resolve the issue, change the date and time settings on the device. Select 'Start' > 'Settings' > 'Clock and Alarms'.
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This issue may occur if one or more of the following condition are true: The computer's date and time settings are incorrect. The certificate has expired or is not yet valid.
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If you're seeing the Not Secure error, it likely means that your site doesn't have an SSL certificate and is not using the HTTPS protocol. The notification does not mean that your site is compromised or not functioning correctly.