Please follow these steps to download, install and activate Visio 2021 Professional successfully on your computer:
Visio Professional 2021 makes it easier than ever for individuals and teams to create and share professional, versatile diagrams that simplify complex information. Visio Professional 2021 includes updated shapes, templates, and styles; enhanced support for team collaboration, including the ability for several people to work on a single diagram at the same time; and the ability to link diagrams to data instantly. Visio Professional 2021 also helps prevent information leakage by enabling Information Rights Management.
1. Download the image file from Microsoft's CDN Server:
Click here to Download Microsoft Visio 2021 Professional 
2. Please click on the download link to download the image file. After successful download please double click the file and a new drive will appear under "This PC". Please access that drive to start the installation. The process is called image mounting. It is like if you would have inserted the DVD.
Note: If your computer is running Windows 8, just right click on the img file, and click Mount. This will load the img file to the DVD Driver, then you can open it there.
Otherwise, we will need assistance of some other applications to do any of following:
- extract the files (for example, the freeware 7-Zip)
- burn it to a disk
- mount it to a virtual DVD drive (for example, the freeware )
3. Install the software
4. Enter the product key provided by us and activate the software