Hi!
Try this then:
(Explorer = My Documents)
1) Make sure you have only one Explorer window open. Right click on an empty space of a folder and select “View – List”, then right click again and select “Sort by – Type” (if you don’t see the “Type” option, click on “More…” at the end of Sort Options and in the list that appears find the “Type” option and bring it to the top of the list.)
2) Press the alt key to release the top menu of Explorer, and go to “Tools – Folder Options”. Go to the second tab (“View”) of the dialogue box that appears, and press the “Apply to Folders” button. You will be asked to confirm; do it.
3) Close the window by pressing the Ctrl key and (with this key pressed) clicking the x button at the right top of Windows Explorer.
You may need to repeat this for each folder type, since Windows keeps different default options according to folder types (image folders, document folders, etc). After a while you will need to repeat the first and the third step, since Windows will revert to its default sorting options after you have opened some (thousands of) times the Windows Explorer.
Hope this helps!
Martin