Download the HKY2107XP.EXE file to a temporary or download directory (please note this directory for reference).
If a previous version of the HotKey Utility is still installed on the computer, follow the steps below to uninstall it. Otherwise, continue with step 5.
Click Start and click Control Panel.
At the "Control Panel" window, click the "Add or Remove Programs" icon.
At the "Add or Remove Programs" box, from the "Currently installed programs" list, click the "HotKey Utility" entry to highlight it.
Click the Change/Remove button.
At the "Welcome" screen, click the "Remove" option and then click Next.
At the "Confirm File Deletion" box, click OK. Please wait as the files are uninstalled.

NOTE: If a "Shared File Detected" box appears, click the "Don't display this message again" box (to check it), and then click Yes.
At the "Maintenance Complete" screen, click Finish.
Click Close to quit the "Add or Remove Programs" box.
Click the X in the top-right corner to close the "Control Panel" window.
Restart the computer.
Click Start and click Turn Off Computer.
At the "Turn off computer" menu, click Restart.
After the computer has restarted, continue with step 5.
Go to the directory where the file was downloaded and double-click the HKY2107XP.EXE file to begin the installation.
At the "Sony Hotkey Utility 2.

This program installs the Sony® HotKey Utility.

http://esupport.sony.com/US/p/swu-matrix.pl?upd_id=628