Can't Access Facebook

[zingo1327]

When i try to access facebook I get a "secure connection failed" or "unable to locate secure connection". It's been no problem for the past year.
I can access all other websites. Have I accidentaly pushed a wrong key or button.?

[Buenchico]

It's almost certainly a browser issue but, since you've not told us which device you're using (PC? Android phone? iPad?) and which browser you're using (Internet Explorer? Edge? Chrome? Firefox? Safari? Opera? Avant? Vivaldi?) it's a bit difficult to point you in the right direction!

More info, please!

[zingo1327]

sorry. It's a PC using windows xp and Firefox

[Buenchico]

Thanks for your reply. I know that I can appear to be a grumpy old so-and-so when I demand extra info but it really does help ;-)

Step 1:
Let's start with the simplest possible cause of the problem, which is that your PC's clock might be set to the wrong date and time. (If it is, valid security certificates from websites might appear to be invalid). Hover your mouse over the clock at the bottom right of your screen and check that both the date and time are shown correctly. (If they're not, right-click on the clock and select 'Adjust Date/Time).

Step 2:
If that didn't help, the next thing to try is clearing Firefox's cache:
Click on the 'hamburger'. (Three lines, top right)
Select 'Options'.
Click on 'Privacy and Security'.
Scroll down to 'History'.
Click on 'Clear History'.
Ensure that there's a tick next to 'Cache'. (Remove any other ticks unless you want to delete that data too).
Click 'Clear Now'.

Step 3:
If that didn't help, try this:
Type 'about:config' (without the quote marks) into Firefox's address bar.
Hit 'Enter'.
Click the blue button to 'accept the risk'.
Type 'security.ssl' into the search box (again without the quote marks)
Look for the line showing 'security.ssl.enable_ocsp_stapling'. (It's the 4th line down on my machine).
On that line, double-click on the word 'true', to change it to 'false'.

Step 4:
If you're still getting nowhere, refresh Firefox to get it back to it's 'out of the box' state:
First note down the names of any extensions you're using, such as Adblock Plus, as you're about to remove them. (To do so, click the hamburger and then 'Add-ons'. If it's not already select, then click on 'Extensions').
When you've done that, click the hamburger, then 'Help' and 'Troubleshooting Information'.
Click 'Refresh Firefox' (at the top right).
Reinstall any extensions you want.

Good luck!

[CrapAtCryptics]

maybe its XP related some newer programs just wont run