Adobe Acrobat reader adds the web browser plugin using which you can view PDFs in a web browser. After installing the Windows 10 2004 update, you may be unable to print PDF files from the web browser/frame, especially when using Internet Explorer. The print dialog box doesn’t open and nothing happens if you issue the Print command from the browser.
However, you can save the PDF file locally and open/print using Adobe Acrobat Reader without any issues.
This seems to be a bug in Windows 10 2004. Until Microsoft or Adobe issues a fix for this issue, you may disable Protected Mode in Adobe Reader as a workaround.
Disabling Protected Mode should be used if you have no other option, and if the PDF files you open are from a trusted source.
To learn more about the Adobe Reader’s Protected View feature for PDFs, check out the link below:
Can’t Print Adobe PDF Documents from Browser in Windows 10 2004
To enable printing of PDF files from the web browser in Windows 10 2004, disable the protected mode option in Adobe Acrobat Reader.
- Open Adobe Acrobat Reader.
- From the Edit menu, click Preferences. Alternately, press Ctrl + K.
- In the Categories list on the left, select Security (Enhanced)
- Uncheck Enable Protected Mode at startup option.
- Click Yes when you see the following prompt:
Disabling Protected Mode also disables Protected View and AppContainer. For changes to take effect, you need to manually restart the application. Are you sure you want to continue?
- Click Ok.
- Close your browser (e.g. Internet Explorer) and reopen it.
You should now be able to print PDF documents from the browser directly.
If you want to modify the above setting using the registry, open the Registry Editor (regedit.exe) and go to the following key:
bProtectedMode and set its data to
Exit the Registry Editor.
The registry method can be helpful if you want to make the changes in multiple computers. You can automate it using a .reg file.