It is impossible to install HP Hotkey Support 5 on my HP ProBook 470 G1.
There might be several causes for that installation error:
You are using a setup package that's not compatible with the version of the OS currently installed on your computer. Download the new driver using the following URL: http://h20564.www2.hp.com/hpsc/swd/public/readIndex?sp4ts.oid=5405158&swLangOid=8&swEnvOid=4158
The setup package is launched without Administrative rights. Right click the setup package and select Run As Administrator.
The package is corrupted and requires another download (see step 1).