Add or Remove Programs entry for Alt-Tab Task Switcher Powertoy for Windows XP. Alt-Tab Task Switcher is a PowerToy for Windows XP that adds functionality to the task switcher already included in Windows XP (Alt+Tab). With this PowerToy, in addition to seeing the icon of the application window you are switching to, you will also see a preview of the page. This helps particularly when multiple sessions of an application are open.