This will show you how to drag and drop the tabs as a new feature in IE9 and IE10 to arrange them how you like in the same IE window, move a tab as a new IE window, or move a tab into another opened IE window.
OPTION ONE
To Drag and Drop Tabs to Rearrange Order in Same IE9/IE10 Window
NOTE:This is the same way as it was in IE8.
1. In IE9 or IE10, left click or press on and hold the tab that you want to rearrange. (see screenshot below)
2. Drag the tab left or right to move it where you like within the other tabs. (see screenshots below)
3. When you have the tab where you like, release the left click to drop the tab there. (see screenshot below)
OPTION TWO
To Drag and Drop Tabs to be in a New or Another IE9/IE10 Window
NOTE:This can be real handy if you have multiple IE9 or IE10 windows opened on multiple monitors. This will let you drag and drop tabs across multiple IE9 or IE10 windows and/or monitors.
1. In IE9 or IE10, left click or press on and hold the tab that you want to move. (see screenshot below)
2. To Move a Tab to a New IE9 or IE10 Window
A) Drag the tab out of the current IE9 or IE10 window. (see screenshot below step 1)
B) Move the tab to where you would like the new IE9 or IE10 window to be on the desktop of any monitor.
C) Release the left click to drop the tab at that location as a new IE9 or IE10 window with that tab opened in it. (see screenshot below)
3. To Move a Tab into Another Opened IE9 or IE10 Window NOTE:This is if you wanted to move a tab from one opened IE9 or IE10 window to another opened IE9 or IE10 window, or back.
A) Drag the tab out of the current IE9 or IE10 window. (see screenshot below step 1)
B) Move the tab to the tab bar location in any other opened IE9 or IE10 window.
C) Drag the tab left or right to move it where you like within the other tabs in this new IE9 or IE10 window.
D) When you have the tab where you like, release the left click to drop it there. (see screenshot below)
Sorry for the late reply. I've been hunting, but I cannot find any way or setting that will disable the ability to drag and drop tabs in Internet Explorer when tabbed browsing is turned on.