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The message is generally that your computer does not know what program created a specific type of file. Use Google to search the file type, for example *.jpg or *.doc That will tell you the type of program that made the file.

If it is a video file or image file, you can find free programs which will open most of these.

Once you know the program, right-click the file and see if you have that program loaded on your PC. If you do, highlight the program name and choose "Always use this program to open similar type files". Click OK.

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14y ago

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