In updating my Lightroom to 5.7, I get error message. "Error 2721 etc

Question

In trying to update my Lightroom to 5.7 from 5.6, I get the following error message. The installation then ceases and no changes are made.

I have done this now a number of times, have switched my computer off, and have no other processes running.

"Error 2721. Custom action_delete_installcookie_file not found in Binary table stream"

I don't understand this error.

How do I go ahead and install 5.7 please?

Thank you.

Simon

Jeffrey_A_Wright · Answer

Simon which operating system are you using? Have you tried removing the current installation of Photoshop Lightroom 5.6 prior to installing 5.7? The update contains the full installation for Photoshop Lightroom 5.7.

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