To check your Hotmail account, go to www.hotmail.com and enter your email address and password into the appropriate boxes. Doing this allows you to access your email. If you have forgotten your password or are having trouble logging in, click on the "Can't access your account?" link and follow the instructions.
If you are still having trouble accessing Hotmail, make sure that you have a connection to the Internet. If you are connected, try opening Hotmail in a different web browser or restarting your computer. Also, if you are attempting to check your Hotmail account from work, be aware that some companies block access to personal email, making Hotmail inaccessible from a work computer.