It seems you accidentally changed your default sort order of explorer. Try opening explorer, navigating somewhere, eg content of C:\ setting your prefered sort order (name) and [b]closing window with the X button while holding the CTRL key[/b]. This should make that sort setting default, but might not work for folders remembering different manual sort order (I'm not sure).
See this howto (viz http://www.thefreewindows.com/2633/change-the-default-view-and-sort-options -in-windows-7-explorer/ ) for more info. Some says that restart is needed also. And/or google for `[url=https://www.google.com/search?q=windows+explorer+default+sort+order]window s explorer default sort order[/url]`. -- <http://forum.pspad.com/read.php?2,64272,64282> PSPad freeware editor http://www.pspad.com
