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How to UNBLOCK a file

PowerPoint file won't open or gives error messages when opening

When you doubleclick a PowerPoint file or use File | Open to open an existing file, PowerPoint gives you an error message.

It might be any of several error messages, but the problem may be that you've downloaded the file from the internet or a network, or you've received it in email and saved it to your computer's hard drive. Windows has "blocked" the file and as a result, PowerPoint can't open it.

If that's the problem, the fix is simple:

UNBLOCK the file

To see if the file is blocked and if so, unblock it, do this:

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How to UNBLOCK a file
Last update 02 July, 2016
Created: 02 July, 2016