I've been using wordpress for about a year and I recently updated to the 3.7.1 version. Recently, someone hacked into my account and changed one of my plugins. The plugin that is now active allows people to register on my website (http://dossrealestategroup.com). I keep getting tons of registration notifications via email. I want to login to my website and delete the plugin and adjust my administration setting but every time I log in, it says that cookies are not enabled when they actually are (I'm using firefox). Sometimes when I log in, all I get is a blank white screen. I have no idea what to do. Any assistance that I can get will be greatly appreciated.