If you got bored with the typical theme of Hotmail (i.e. Microsoft Outlook) and want to make it somewhat different, it is not a problem at all. Indeed, unlike many other email service providers, Microsoft took into account that users might want to change the standard theme and provided quite a decent selection of standard themes. Thus, you can simply change the standard theme by following the guide presented below.
Enter the website of the Hotmail service (http://outlook.com or http://hotmail.com) or choose Outlook.com in Microsoft MSN.
Type the name and password of your email account in and click to Sing in further.
Once you have entered into your account, click on the icon of settings in the up-right corner of the screen (have a look at the screenshot).
In the pop-up window, click on the last button under the name "Options."
In the window that you will see on the left side of your screen, choose the section of the General options (by default, the section of Mail options will be opened).
In the General settings, choose the first button: "Change theme."
Choose a theme (among all the offered ones) you wish to apply. There are a total of 38 various themes of up to date.
Once you have made up your mind regarding a theme for your Outlook, click on that theme and then on the "Save" button.
Congratulations! Now, you have just installed a new theme for your Hotmail account. As you can see, all the design of your email has been changed (for example, you can have a look at the last screenshot). You can repeat the procedure whatever number of times you want in case if this and the following themes will be annoying for you and you would want something else.