FortiClient 5.6 for Windows: "installation ended prematurely" and rolls it back

[burcu]

Hello,

I am using Windows 10 Pro.

When I tried to install FortiClient 5.6 for Windows it gives error: "...installation ended prematurely..." and rolls it back.

Previously I uninstalled FortiClient 5.6 for Windows. 

[sl4qr]

I have had this same problem with version 4.6 in Windows 7 Pro and Windows 10.

In my instance, there was no previous version of Forticlient installed.