Missing Yes/No in all dialog boxes

Since updating the computer to Windows 10, whenever Windows 10 displays the security dialog box asking permission for some program to modify the PC, the box for Yes/No is missing so it's not possible to run the program. Any ideas how to fix this? Thanks!

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Something similar happened on one upgrade.

It was a video driver issue. I can't find any PC details in this thread yet. May want to finish your post with the details.

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Details of computer

It's actually my husband's computer and I can't get that information right now. I do know that he's running 'Fences' which I have told him to uninstall but before doing that I thought I would check the forum for other advice. He is also running Display Fusion.

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The culprit was a program called WindowBlinds. After disabling it, all is fine.

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There are many add ons like that.

The symptom is one I've seen but as it was caused by other than Window Blinds I would be buying lotto tickets and winning if I guessed that.

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