If you simply try to install Flash Player on your laptop it probably won't work. That's because it was already present but has simply malfunctioned.
Start by uninstalling 'Adobe Flash Player Plug-in'. (With Windows XP that's done via Start > Control Panel > Add or Remove Programs. With Vista or 7 go to the Control Panel and then to either 'Programs' or 'Programs and Features', depending on the display setting you're using).
Then restart your laptop.
Lastly, reinstall Flash Player from here:
http://get.adobe.com/flashplayer/
Chris