CCleaner stopped working on opening

Hello, I'm using Windows Vista and it's some months I cannot use CCleaner anymore. One day I installed an update of the software (don't remember what version was) and then it crashes when opening it, so I decided to install an older version of it and then it worked, but now it doesn't work it too and older versions too (I tried versions from 4.16 to 4.11). What can I do? I've uninstalled it lot of times and rebooted, I've also used the Windows disk cleaner but nothing changed. As AV I'm using Microsoft Security Essentials and Chrome as main Browser.