Both windows , your webbrowser, and your firewall may question the process as a security precautions. Be prepared for some difficult questions.

1. Select RUN or OPEN to start the installation immediately (recommended)
2. SAVE means that you are first saving the downloaded installation file to your computer.  Subsequently, you will have to doubleclick the saved file ( 44install.exe) to start  installing.

In some cases you receive a warning about an unknown program. This is normal, and you should choose the RUN option