IE 10 says "This page can’t be displayed" Chrome, Safari can.

Do you want the login? There are only 500,000 attorneys with access to it. Would that help?

Here it is:

Thank you for all your help. I'll follow your advice.

Thank you very much! I really didn't know what to do next. Thanks.

Ok, I nuked it back to mama. Added nothing.
First image is same 'can't display' error.
Windows 7 Troubleshooter output.
Event log was interesting....something about "Filtering" and IPSec. Greek.

M980 said:

I go to a court site, click on a link and a new window pops up. It is supposed to display a PDF but IE gives this messsage:
“This page can’t be displayed.” It mentions TLS and SSL should be enabled.

I have them ALL enabled.
I set them to default values.
“Fix connection problems” results in “Troubleshooting couldn't identify the problem.”

Chrome and Safari work just fine displaying the PDF correctly.

I set everything back to default values. No joy.
I’ve “repaired” IE 10. No joy
I re-installed IE 10. No joy.

What’s a good next step to diagnose this?

I tried everything you did plus about two dozen other things. On one occasion, I thought I had the answer by clicking the box to show all websites in compatibility view, but that 'success' only lasted a short time, and I was back to the problem. I "resolved" my problem by just giving up on Internet Explorer....set Safari to be my default browser, imported my favorites, set it up to have the look and feel I wanted, and my problems have been solved. I no longer have to try to log in to secure websites six or seven times. Running IE 10 on Windows 7 64bit computer...IE 10 ran 64 bit versions....
There's a limit to how long someone should be willing to chase a problem created by Microsoft. I've reached mine, though I did just buy a new PC....my family has switched to Apple, and now I'm switching to an Apple browser.