Certificate errors occur when there is a problem with a certificate or the server's use of the certificate. Internet Explorer can help keep your information more secure by warning you about certificate errors.
I just fixed my laptop, and I found that many of the sites that I always visit have certificate errors and the security certificate is expired or not yet valid, etc... Why did this happen? Is there anyway I can fix this problem? Thanks.
The main reasons for Internet Explorer certificate errors are:
• The date of your computer has been set to a wrong value
• The Security Certificate has expired
• The website is actually unreliable
The common explaination could be the computer's wrong date. Because the security certificate is valid for a period of time. So if the time is incorrectly set on your computer, you may receive this security certificate error message when browsing sites. So the first thing you are supposed to do is to check the date on your computer. Usually, after setting the date correctly, you can access the sites normally. If not, the security certificate of the website may really have expired or the website is not trustable. So never put your important password or login ID on such page on which Security certificate error happens.
If the solution above can't help, there may be IE errors in your system files. You can't find it by simply opening and checking system files. Using a PC system maintenance tool to perform this work will be more convenient and effective. If you still haven't a choice, CCleaner can be a nice option, which can do this job within 1 click. Download and install it on your computer, then it will automatically check all errors out and you only need to give one click on the "Fix Now" button. All problems go out of your computer. Besides, you can also learn to fix runtime error in Internet Explorer.
If you are sure the website is trustable, you can manually set it as a safe website on your Internet Explorer to view it successfully.
Then you can access the website now. If you don't want to set it as a safe website, you also can remove it from the list of trusted sites from your Internet Explorer.