You can disable it by going to view and unchecking the Files Name Extension if it is already checked
Why Does Windows automatically show file extensions
Why Does Windows automatically show file extensions. I uncheck the File Name Extensions in the folder view tab under show/hide. Then for now reason Windows will re-check File Name Extensions in the folder view tab under show/hide. This is SO ANNOYING.
How do I permanently keep the File Name Extensions unchecked?
Windows for home | Windows 10 | Settings
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15 answers
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Anonymous
2019-10-24T12:34:51+00:00 -
Anonymous
2019-10-24T12:57:30+00:00 -
Anonymous
2019-10-24T13:09:33+00:00 Dear Harry,
Try uninstalling Trend Micro if it is easy for you to reinstall it after to see if it fixes your problem.
If you can't uninstall it, try disabling it totally to see if your problem gets fixed.
Regards,
Hadrien
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Anonymous
2019-10-24T13:05:41+00:00 I'm not sure I haven't really timed it.