Pro home verzi by mohl zafungovat 7 Taskbar Tweaker.
http://helpdeskgeek.com/windows-7/disable-taskbar- thumbnail-previews-windows-7/
edit:
Nebo tahle finta:
http://www.sevenforums.com/tutorials/52265-taskbar -thumbnail-previews-enable-disable.htmlThis sets the delay time to 100000 ms (1000 milliseconds = 1 second) to effectively disable them.