This tool automatically checks to see if a list of hotmail accounts are available to register. Simply choose a text file with a list of hotmail accounts, choose a text file as the output, and press start!
It should be compatible with all operating systems that support java. To open, double click the .jar file and the program should start. If that doesn't work, open up the command prompt / terminal and execute the command 'javaw -jar C:\path\to\file\HotmailChecker.jar'.
If you have any questions, I am here to answer them!