Last Modified: December 3, 2014
Updating Visual C Runtime
Microsoft will occasionally update the C runtimes as part of their automatic update. If the Previzion build was compiled with a later version of the C runtime than the build on a system, executing Previzion will fail with a message indicating that re-installing the application may fix it.
The correct fix is to install the most up to date version of the C runtime. Once downloaded, simply execute to update Runtime.
You may download the latest version of Microsoft Visual C Runtime from our Download Dashboard.
June 2011 Security Update
With builds later than May 2011, this update needs to be installed on the target machine using Internet Explorer:
To run this update, go to on the link above and select “http://update.microsoft.com/microsoftupdate/” under “Skip the details: Download the updates for your home computer or laptop from the Microsoft Update website now.”
This will launch a web browser instance of windows update. However, this will automatically prompt you to install and/or enable ActiveX plugin with Windows Update.
- Click on the Yellow Bar and allow this addon.
- Make sure to select “Custom” and NOT “Express” installation when prompted. Windows Update will run the same, but this allows it to find important Visual C++ updates.
If you haven’t updated Windows in a while, you may need to run Windows Update more than once.