You have Microsoft Office Click-to-Run installed on your computer.
You try to install a 64-bit version of Microsoft Office.
In this scenario, the 64-bit version does not install. Additionally, you receive the following error message:
This 64-bit product may not be installed with Microsoft Office Click-to-Run. Remove Microsoft Office Click-to-Run and try again.
To work around this issue, uninstall Microsoft Office Click-to-Run and then install the 64-bit version of Microsoft Office.
To determine whether you have Microsoft Office Click-to-Run installed on your computer, click the File tab and then click Help. If you see a Click-to-Run Product Updates section, then Click-to-Run is installed on your computer.
To uninstall Microsoft Office Click-to-Run from your computer, follow these steps:
Click Start, and then click Control Panel.
Click the Add or Remove Programs item or click the Programs and Features item.
In the list of installed programs, click Microsoft Office Click-to-Run (2010 or 2013) and then click Uninstall.
Click Yes when you are prompted to remove all applications that were installed by Office Click-to-Run.