Browse to C:\Program Files (x86) and copy the A4A folder to C:\Program Files

Restart ACT!

More details on how to copy the folder:

Click on the Windows Start button and choose Computer.  Otherwise, right click on the Start button and choose Open Windows Explorer

Double click on Local Disk C: drive

Double click on C:\Program Files (x86)

Highlight the A4A folder and right click on it.  Choose Copy

Choose the back button on the left side of the toolbar to go back to your C: drive

Highlight the C:\Program Files folder and right click.  Choose Paste and accept any prompts you might have.

 Restart ACT!