HP Touchsmart 520: changed file extensions

After the last update on windows 7, all my file names have added extensions for them. For example, Alien has changed to Alien.mkv. Each video, the song and the document on my computer did. If I plug in an external hard drive, it changes too. Any ideas how to change their return other than to do it manually for each file? I get a warning also that the file may not work if I change.

Hello

Extensions are usually hidden by default (but should not be changed or deleted), in order to check the following.

On the Start Menu, open the control panel and open Folder Options.  Click the view tab and make sure the box next to the entry "Hide extensions of known file types" is checked.  If you need to enter a check mark against this article, click on apply then Ok to save the change.

Kind regards

DP - K

Tags: HP Desktops

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