Problem:
When connecting PubMed within EndNote program, you may get the following error message: 

Please follow the steps to solve this problem.

Step 1 
Type "Internet Options" in the search box on taskbar and choose Internet Options in the result.

Stpe 2. 
Scroll down to the bottom of the Settings window.
Uncheck the following options:
囗 Check for publisher's certificate revocation
囗 Check for server certificate revocation (requires restart)

Updated: 2020-12-14