Keep getting error message "Internet Explorer has encountered an problem and must shut down", when I try to use ny Yahoo service such as Yahoo Email

Try emptying your temporary internet files and such:

Tools > Delete Browsing History

Make sure the following are checked:

Temporary Internet Files

Cookies

History

InPrivate Filtering data

And leave the first box unchecked (Preserve Faveorites Website... )

For Internet Explorer 8.

Then exit out of Internet Explorer and then start it up and give it a try.

https://www.askmehelpdesk.com/internet-web/yahoo-error-message-internet-explorer-has-encountered-en-error-must-shut-down-470017.html

No need to post twice.