Steam Invalid SSL Certificate



  • For the past few months I have been having an issue with Steam, and I have finally decided to ask about it. I've looked up solutions but none of them work, and nobody else has seemed to have had the same problem.

    The issue:
    Any time I try visiting a page (except for my Library page for some reason) Steam will give me this error: Error Image Apparently nobody I can find has had the same issue. I can't contact Steam support because their support email is down apparently and if I try filling out the form, it gives this same error. If I try using it on my browser it says that the URL isn't secure. I have made sure the URL is correct too.

    Things I've tried:
    Clearing my Cache
    Reinstalling Steam
    Restarting my system
    Much more other stuff, the list could go on.

    If you need details on my system info, please ask me for the specific information you need. You can also ask if you need more details on the error or anything else.

    Edit for time sync answer:
    I tried out the answer (sync my time) given to me by a user but it didn't work, still gives me the error.
    Time Sync Image

    At the same time I tried looking at more info for the issue and when I looked at the certificate details it says it was issued on "Tuesday, December 21, 2021 at 6:00:00 PM", and expires on "Wednesday, December 21, 2022 at 5:59:59 PM". So it's not expired.
    Certificate Info

    I have also checked out the more information tab on the security warning my browser gives me, it says it may be due to a network attack but I highly doubt it, I even ran malware scanners and checked with other sites/devices connected to the network and this problem doesn't happen with the other stuff. Other browsers I tried also give me the same warning.
    Opera GX Warning

    Edit for certificate checking and stuff:
    I went through and checked if the certificate is in the list of trusted authorities, and it is.
    Digicert Appears
    However if I try to open it, it will give me this error before letting me continue.
    Digicert Error
    The thumbprint (5fb7ee0633e259dbad0c4c9ae6d38f1a61c7dc25) matches the one given to me by @user1558321, but I did notice that when I look at it four of the things have a special icon on them, two are yellow warnings and two look like download symbols.
    Errors/Downloads
    I think it might be something to do with the error below, but I don't know how to give it a valid signature or pathway.
    Invalid Signature
    Post note: This answer did work, I just accidentally did something wrong and forgot to remove the old invalid certificate from my PC!



  • When you connect to the Steam page, your browser/Steam client checks the SSL certificate that is provided by the Steam page. Steam's certificate is provded by DigiCert who is a trusted certificate authority and does not seem to have any problems with their certificates at the time of writing this answer. Steams certificate chain If you did not change anything in your computer regarding certificates it should be trusted.

    That means the problem is in your computer configuration. Now a common problem which could cause problems in certificate validation is the certification expiration check. When your computer validates a certificate it will compare it's expiration date with your computer time. As a first step, please check If your computer time and date is correct. Sometimes even a few minute error with the actual time could cause certificate validation problem.

    (I'm starting with this approach because I did notice that a few months ago https://gaming.stackexchange.com/questions/396658/will-setting-your-time-to-april-1st-bring-back-april-fools-features-on-minecraft regarding changing your computer date for a Minecraft April fools event)




Suggested Topics

  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2