You'll most likely need to uninstall and reinstall Chrome, because YOU CANNOT update the embedded Flash Player ("PepperFlash") in Chrome from here.
Use the control Panel to uninstall it... BUT
1. Using Windows explorer go to C:\users\[user name]\AppData\local
2. Delete the Google folder you see there
3. Reinstall and start chrome again, it should work now.
[user name] is your logon name.
In order to access the AppData folder, you need to "Show Hidden Files and Folders" in your Folder Options.