Many people use Windows Live Messenger today. Chatting, and keeping track of the mail is useful, but lately there has been added new changes to it, including advertisments and limitations. There is however possible to remove/change this with an simple Patch.
Open the application, and follow the instructions. Choose whatever you want to change, and patch. The program has a restore-function if you want to undo any changes.
Here is a step-by-step video showing this: