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Could you please let us know which version of Office are you using?
For Office 2019, Office 2016 and Microsoft 365 Apps, if you do not find PowerPoint Key under HKEY_CURRENT_USER\Software\Microsoft\Office\16.0
but find other keys like "Excel", " Word", I would suggest you create this PowerPoint key manually.
- Right-click the 16.0 registry key > New > Key > Rename this subkey to: PowerPoint > In the same way, create a subkey of "Options".
- Then follow the steps on the linked article above .
(Serious problems might occur if you modify the registry incorrectly. Before you modify it, back up the registry for restoration in case problems occur.)
Besides, you can also perform an Online Repair for Office from Contral Panel.
Any updates, welcome to post back.
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