Adobe constantly have security issues with their 2 major products Reader ( for PDFs ) and Flash.
Adobe Flash is really something you can do without , so uninstall it.
Google Chrome has built in Flash so any websites that still use this ( God only knows why ! ) can be viewed with this browser , this is much safer.
So How Do You Uninstall It ?
Go to your Control Panel – Open up Programs – look for Adobe Flash and just uninstall it.