Jon Hartley Posted January 9, 2019 Report Share Posted January 9, 2019 On one of my installs, I cannot use the preview feature within Outlook. When I attempt to preview the file I get the following message: This file cannot be previewed because the following previewer has been disabled: Nitro PDF Preview Handler [button] Enable previewer When the button is pressed nothing happens and the file can not be previewed. I have associated .pdf files with Nitro in the fill association settings in Windows 10. What am I missing? Link to comment Share on other sites More sharing options...
Official Nitronaut Allain Umailin Posted January 9, 2019 Official Nitronaut Report Share Posted January 9, 2019 Hello @Tech Support, Thank you for reaching out to us through our Community Forums! To fix this issue, kindly refer to these steps: 1. Run a repair on Nitro Pro. You may refer to this article: http://kb.gonitro.com/knowledgebase#/search/repair/000001641 2. Re-register the DLL file using the following Administrator command (Admin CMD): For 32-bit: regsvr32 -u "C:\Program Files (x86)\Nitro\Pro\ X\NitroPDFPreviewHandler.dll" regsvr32 "C:\Program Files (x86)\Nitro\Pro\ X\NitroPDFPreviewHandler.dll" For 64-bit: regsvr32 -u "C:\Program Files\Nitro\Pro\ X\NitroPDFPreviewHandler.dll" regsvr32 "C:\Program Files\Nitro\Pro\ X\NitroPDFPreviewHandler.dll" X = the version number of Nitro Pro the user is working with. Thanks for choosing Nitro Pro and I hope this helps! Link to comment Share on other sites More sharing options...
Jon Hartley Posted January 10, 2019 Author Report Share Posted January 10, 2019 Hi, and thank you for the reply. I did the repair function to no avail. I also successfully unregistered and re-registered the PDFPreviewHandler and there does not appear to be any change in the behavior. The workaround for now is to set another PDF app as default for preview functionality. Link to comment Share on other sites More sharing options...
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