Adobe Acrobat is running but no user interface is shown on Windows 8.1

We've recently come across a strange problem after upgrading to Windows 8.1.

We use a Windows forms based test construct application that generates PDF documents and then displays them in the .NET WebBrowser control.

The application (and Visual Studio when it is hosting the application) run as Administrator (configured in the App.Manifest) causing a UAC problem when the application is debugged.

What we've noticed is that the .NET WebBrowser control cannot display the PDF when the application is running under UAC nor an the PDF be launched using the System.Diagnostics.Process.Start() method.

If we remove the lines in the App.Manifest file the PDF displays correctly in the browser and also launches externally.

When running as Administrator the Acrobat process is running (it can be seen in Task Manager) however isn't visible in the user interface.

Comments

Post a Comment

Popular posts from this blog

Windows Server 2016, 2019, 2022, Windows 10 and Windows 11: Date and time "Some settings are managed by your organization".

Image
When you're using the new "Modern" date and time settings in Windows Server 2016, 2019, 2022, Windows 10 and Windows 11 you may find that you can't set the correct date and time and the value "Some settings are managed by your organization". - While you're here - Why not check out our Windows Server Documentation and Audit Tool? The simplest way around this is to go back to the proper control panel using Start, Run, "Control.exe" and searching for "Set the date".  Within here you can set the date and time manually as required If you try and click the Change time zone button you may again get access denied... To resolve this open an elevated command prompt by right clicking the command prompt and selecting Run as Administrator  From there run the command rundll32.exe shell32.dll,Control_RunDLL timedate.cpl This will open the Data and Time control panel app elevated as an Administrator.
Read more

TFTPD32 or TFTPD64 reports Bind error 10013 An attempt was made to access a socket in a way forbidden by its access permissions.

Image
When you start the trivial FTP (TFTP) server application TFTPD32 or TDTPD64 you may see the following error Bind error 10013 An attempt was made to access a socket in a way forbidden by its access permissions. This can be because another application is using this port. The easiest way to check if (and which) application is using the port is as administrator run an elevated command prompt and enter netstat -anb > ports.txt Then open ports.txt in Notepad and search for :69, you'll quickly be able to see the process using the required port - While you're here - Why not check out our Windows Server Documentation and Audit Tool?
Read more

Enable function lock for F1-F12 on HP ZBook mobile workstations

Image
When you press the function keys on a HP ZBook mobile workstation you may find that they don't operate as expected. This is because of function lock, if you hold the fn key the function keys work as expected. You can lock the function keys on as described in this document. https://support.hp.com/gb-en/document/c02035108 However there are two things to note Firstly following a BIOS upgrade (which occurs automatically if you have the preinstalled HP software still installed) you may lose your locked function keys and have to reapply.   Secondly the HP documentation states you press the fn lock and fn keys at the same time as per the image below from the page.  While you're here - Why not check out our Windows Server Documentation and Audit Tool? This is not the case, you need to press and hold the fn key, and then tap the fn lock key to toggle function lock, not an obvious thing when you start work first thing in the morning and are hammering the function keys try
Read more