I don't recall seeing that one before.

When you have a problem with one particular site, a good "first thing to try" is clearing your Firefox cache and deleting your saved cookies for the site.

(1) Bypass Firefox's Cache

Use Ctrl+Shift+r to reload the page fresh from the server.

(You also can clear Firefox's cache completely using:

orange Firefox button or Tools menu > Options > Advanced

On the Network mini-tab > Cached Web Content : "Clear Now")

(2) Remove your live.com cookies (save any pending work first) using either of these:

• While viewing a page on live.com, right-click and choose View Page Info > Security > "View Cookies"
• Alt+t (open the classic Tools menu) > Page Info > Security > "View Cookies"

Then try reloading the page. Does that help?

I already tried everything, nothing works and it's not just hotmail, it's any secure website

Okay, that paints a very different picture.

(1) Can you check that your connection is not going through a proxy?

orange Firefox button or classic Tools menu > Options > Advanced > Network > "Settings" button > No Proxy

(2) Have you checked for malware? These two free tools are highly regarded for supplemental scans:

Malwarebytes Anti-malware : http://www.malwarebytes.org/products/malwarebytes_free

SUPERAntiSpyware : http://www.superantispyware.com/

(3) Did you try Firefox's Reset feature? More information: Refresh Firefox - reset add-ons and settings.

Sorry, I forgot to mention, if you have SSL problems on all sites, it often indicates that your system clock is not set correctly. If you rely on a time server to keep your system clock correct, it might have glitched.

I told you i tried everything, I already looked up that problem and tried everything and that's why I posted that question

Which security software (firewall, anti-virus) do you have?

Some security software intercept secure connections and send their own certificate.

Some examples are ESET and Bitdefender.

• ESET setup -> advanced setup -> extend web and email tree -> SSL
• SSL protocol: Do not scan SSL protocol

• BitDefender -> Privacy settings -> disable Scan SSL

You can retrieve the certificate and check details like who issued certificates and expiration dates of certificates.

• Click the link at the bottom of the error page: "I Understand the Risks"

Let Firefox retrieve the certificate: "Add Exception" -> "Get Certificate".

• Click the "View..." button and inspect the certificate and check who is the issuer.

You can see more Details like intermediate certificates that are used in the Details pane.