원문 - 영어 - How to Iconize Your Taskbar

To make the taskbar buttons showing only the icons you must do the this:

Start > Run > regedit > HKEY_CURRENT_USER\Control Panel\Desktop\WindowMetrics

In there you must find the a "REG_SZ" with the name "MinWidth"
(write it without the quotes)
If you cant find it create one on your won with the name "MinWidth"
(write it without the quotes)

Once you find it double click on it and set the number 56 then click ok and close.
registry and restart your computer.