Right click on the installation file Dyno62setup.zip, select "Extract all" click browse and choose a destination folder (EG Desktop)
Right click on the installation file Dyno62setup.exe in its destination folder and select "Properties"

Click on the "Compatibility" tab.
Under the section "Compatibility Mode" :-
Select "Run this program in compatibility mode for:", and then select "Windows XP (Service Pack 2).

Under the section "Privilege Level", select "Run this program as an administrator"
Select OK
Double click Dyno62setup.exe to run the install program

In the box titled "An unidentified Program wants access to your computer" Click Allow
Click Continue
In the box "Do you wish to create icons and folders" click Yes.
In the box Install Drivers "SPA Dyno V5 USB Driver Set", click install (if required, else Cancel).
In the box "Windows cannot verify the publisher of this driver software" Click 'Install Anyway'
In the box Install Drivers "SPA Dyno V6 USB Driver Set", click install (if required, else Cancel).
In the box "Windows cannot verify the publisher of this driver software" Click 'Install Anyway'
In the box "Setup successful" click OK.

If using a USB interface, plug this in and wait for Windows 7 to finish installing the drivers.

Note: If a window title bar shows "not responding" this usually means you just need to wait longer for it to finish.