Resolving error code 80070666 when installing or updating Acctivate.

Users may encounter error code 80070666 when installing or updating. This error indicates the Microsoft Visual C++ 2015 Redistributable component is failing to install. This article will provide different methods to resolve the error.

There are several reasons the Microsoft Visual C++ Redistributable component can fail to install: 

• There is a pending windows update
• The Visual C++ package was damaged
• There is another Visual C++ installation already present

If you encounter error 80070666 , you may try the following steps to resolve:

Method 1: Update Your Windows System

1. Check if there are any pending Windows updates. If there are, install them. 
2. After the windows update, run the Acctivate installer again

Method 2: Repair Microsoft Visual C++ 2015

1. Navigate to Control Panel > Programs > Programs and Features
2. Look for the Microsoft Visual C++ 2015 Redistributable
3. If it exists, right click Microsoft Visual C++ 2015 Redistributable > Change > Repair
4. Once the Microsoft Visual C++ repair is finished running, retry the Acctivate Installation

Method 3: Uninstall All Current Microsoft Visual C++ Redistributable Packages

If Microsoft Visual C++ 2015 Redistributable is not already installed but there are different versions:

1. Navigate to Control Panel > Programs > Programs and Features
2. Look for Microsoft Visual C++ Redistributable
3. Uninstall all current Microsoft Visual C++ Redistributable packages that are already installed
4. Reboot computer
5. Re-run the Acctivate Installation

If none of the above steps work for you, reach out to the Acctivate Support team for additional troubleshooting.