On 64-bit systems, the Acrobat XI or Acrobat DC installer tries to install the Microsoft Visual C++ (x64) runtime if it doesn't find it on the system. If the installation of this runtime fails, the following warning message appears in the installation complete screen:

Acrobat XI: “Warning! Installation of Microsoft Visual C++ 2010 SP1 (x64) runtime failed due to error <code>. Without it, some application functionality doesn't work. For details...“

Acrobat DC: “Warning! Installation of Microsoft Visual C++ 2013(x64) runtime failed due to error <code>. Without it, some application functionality doesn't work. For details...“

If the Microsoft Visual C++ (x64) runtime is not available or installed, the following problems occur:

• The Acrobat PDF Creation add-on for Microsoft Office 64-bit applications (such as Word, Excel, PowerPoint, and Outlook) does not appear.
• Acrobat cannot send emails or resolve addresses via 64-bit Microsoft Outlook.

For Acrobat XI: You can do either of the followings to install the Microsoft Visual C++ 2010 SP1 (x64) runtime:

• Download and install Microsoft Visual C++ 2010 SP1 (x64) runtime from Microsoft Download Center.
• Locate the vc_red.msi for Microsoft Visual C++ 2010 SP1 (x64) runtime that is bundled with the Acrobat XI installer, and try reinstalling it. The vc_red.msi is located in a subfolder named VC10RT_x64 inside the Acrobat installer folder.

For Acrobat DC:

• Download and install Microsoft Visual C++ 2013 (x64) runtime from Microsoft Download Center. You can download vcredist_x64.exe and install it by double-clicking it.