With an average of 124 million users per month as of the second quarter of 2010, Skype is one of the world's most popular Web-based communication tools. It gives you the ability to connect with other Skype users, make phone calls, access wireless networks and send text messages over the Internet using a single program. By default, the Skype application automatically launches every time you start your computer. If you want to prevent this behavior, the program allows you to change the corresponding setting with only a few clicks.
Click the Windows "Start" button, select "All Programs," click the "Skype" folder and then click the "Skype" item. If the application is already open, you can also bring up the program window by double-clicking the Skype icon located at the bottom-right corner of the screen, within the Notification Area.
Click the "Tools" item in the top menu bar and select "Options."
Click the "General" item located on the left side of the resulting dialog box.
Click the adjacent "General Settings" item.
Look to the right side of the dialog box and uncheck the "Start Skype When I Start Windows" box.
Click "Save" to confirm the change.