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It seems like Microsoft goofed up again and did not include a feature in Windows 7 to order taskbar items. To clarify, you can now order the groups, but not the items within the groups.
So let's say I have 10 Windows Explorer taskbar items open and would like to order those taskbar items. What software would I use for Windows 7 to order taskbar items?
Software mentioned in this post "Does any software exist for Windows XP to change the order of items in the taskbar?", does not mention Windows 7 support or specifically says that Windows 7 is not supported.