Forum moved here!

Home / Disabling thumbnail preview of PDF documents


Hi guys, during the installation process of Sumatra PDF, there’s an option to let windows show preview of pdf document. I checked that and now I regret it. Is there a way to disable that? I googled and the solution I found is to disable thumbnail for all types of files, which I do not want. I just want to disable for PDF only. Any help?


Use the uninstall option
that will remove previewer at the same time as the exe
Always a good idea to switch out of windows to check the previewer service is NOT loaded the next start-up
Then install without the previewer active


Just start a command prompt as administrator and enter the following command:

regsvr32 /u "Full path to PdfPreview.dll"

(The PdfPreview.dll file can be found in the same location as SumatraPDF.exe.)

For example:

regsvr32 /u "C:\Program Files\SumatraPDF\PdfPreview.dll"
regsvr32 /u "C:\Program Files (x86)\SumatraPDF\PdfPreview.dll"

If none of this makes sense to you then just do what GitHubRulesOK suggested.


i did that and it seems to work but not after i refresh the desktop. is it because i have adobe acrobat reader dc set as the default pdf viewer? and no, i do not have the thumbnail preview enabled in acrobat’s preferences.


oh wait nvm… uninstalling it seems to work, just the 4 pdf files i had on my desktop seems to be bugged, they still show the thumbnail whereas if i download new pdf file, they dont. Thank you of the solution!