Windows7右键新建无文件夹的选项，网上的解决办法大部分都无效。另，资源管理器里左上角的新建文件夹也是没有反应。
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解决方法：
备份注册表，
把下面的粘贴到文本文件里，保存类型选所有文件，另存为1.reg,用管理员运行。
问题解决。
Windows Registry Editor Version 5.00
[HKEY_CLASSES_ROOT\CLSID\{11dbb47c-a525-400b-9e80-a54615a090c0}]
@="CLSID_ExecuteFolder"
[HKEY_CLASSES_ROOT\CLSID\{11dbb47c-a525-400b-9e80-a54615a090c0}\InProcServer32]
@="ExplorerFrame.dll"
"ThreadingModel"="Apartment"
[HKEY_CLASSES_ROOT\Directory\Background\shellex\ContextMenuHandlers\New]
@="{D969A300-E7FF-11d0-A93B-00A0C90F2719}"
[HKEY_CLASSES_ROOT\Folder]
@="Folder"
"EditFlags"=hex:d2,03,00,00
"FullDetails"="prop:System.PropGroup.Description;System.ItemNameDisplay;System.ItemType;System.Size"
"ThumbnailCutoff"=dword:00000000
"TileInfo"="prop:System.Title;System.PropGroup.Description;System.ItemType"
[HKEY_CLASSES_ROOT\Folder\DefaultIcon]
@=hex(2):25,00,53,00,79,00,73,00,74,00,65,00,6d,00,52,00,6f,00,6f,00,74,00,25,\
00,5c,00,53,00,79,00,73,00,74,00,65,00,6d,00,33,00,32,00,5c,00,73,00,68,00,\
65,00,6c,00,6c,00,33,00,32,00,2e,00,64,00,6c,00,6c,00,2c,00,33,00,00,00
[HKEY_CLASSES_ROOT\Folder\shell]
[HKEY_CLASSES_ROOT\Folder\shell\explore]
"MultiSelectModel"="Document"
"BrowserFlags"=dword:00000022
"ExplorerFlags"=dword:00000021
[HKEY_CLASSES_ROOT\Folder\shell\explore\command]
@=hex(2):25,00,53,00,79,00,73,00,74,00,65,00,6d,00,52,00,6f,00,6f,00,74,00,25,\
00,5c,00,45,00,78,00,70,00,6c,00,6f,00,72,00,65,00,72,00,2e,00,65,00,78,00,\
65,00,20,00,2f,00,73,00,65,00,70,00,61,00,72,00,61,00,74,00,65,00,2c,00,2f,\
00,65,00,2c,00,2f,00,69,00,64,00,6c,00,69,00,73,00,74,00,2c,00,25,00,49,00,\
2c,00,25,00,4c,00,00,00
"DelegateExecute"="{11dbb47c-a525-400b-9e80-a54615a090c0}"
[HKEY_CLASSES_ROOT\Folder\shell\open]
"MultiSelectModel"="Document"
"BrowserFlags"=dword:00000010
"ExplorerFlags"=dword:00000012
[HKEY_CLASSES_ROOT\Folder\shell\open\command]
@=hex(2):25,00,53,00,79,00,73,00,74,00,65,00,6d,00,52,00,6f,00,6f,00,74,00,25,\
00,5c,00,45,00,78,00,70,00,6c,00,6f,00,72,00,65,00,72,00,2e,00,65,00,78,00,\
65,00,20,00,2f,00,73,00,65,00,70,00,61,00,72,00,61,00,74,00,65,00,2c,00,2f,\
00,69,00,64,00,6c,00,69,00,73,00,74,00,2c,00,25,00,49,00,2c,00,25,00,4c,00,\
00,00
"DelegateExecute"="{11dbb47c-a525-400b-9e80-a54615a090c0}"
[HKEY_CLASSES_ROOT\Folder\shellex]
[HKEY_CLASSES_ROOT\Folder\shellex\ColumnHandlers]
[HKEY_CLASSES_ROOT\Folder\shellex\ColumnHandlers\{F9DB5320-233E-11D1-9F84-707F02C10627}]
@="PDF Column Info"
[HKEY_CLASSES_ROOT\Folder\shellex\ContextMenuHandlers]
[HKEY_CLASSES_ROOT\Folder\shellex\ContextMenuHandlers\BriefcaseMenu]
@="{85BBD920-42A0-1069-A2E4-08002B30309D}"
[HKEY_CLASSES_ROOT\Folder\shellex\ContextMenuHandlers\Offline Files]
@="{474C98EE-CF3D-41f5-80E3-4AAB0AB04301}"
[HKEY_CLASSES_ROOT\Folder\shellex\ContextMenuHandlers\{a2a9545d-a0c2-42b4-9708-a0b2badd77c8}]
[HKEY_CLASSES_ROOT\Folder\shellex\DragDropHandlers]
[HKEY_CLASSES_ROOT\Folder\shellex\DragDropHandlers\{BD472F60-27FA-11cf-B8B4-444553540000}]
@=""
[HKEY_CLASSES_ROOT\Folder\shellex\PropertySheetHandlers]
[HKEY_CLASSES_ROOT\Folder\shellex\PropertySheetHandlers\BriefcasePage]
@="{85BBD920-42A0-1069-A2E4-08002B30309D}"
[HKEY_CLASSES_ROOT\Folder\shellex\PropertySheetHandlers\Offline Files]
@="{7EFA68C6-086B-43e1-A2D2-55A113531240}"
[HKEY_CLASSES_ROOT\Folder\ShellNew]
"Directory"=""
"IconPath"=hex(2):25,00,53,00,79,00,73,00,74,00,65,00,6d,00,52,00,6f,00,6f,00,\
74,00,25,00,5c,00,73,00,79,00,73,00,74,00,65,00,6d,00,33,00,32,00,5c,00,73,\
00,68,00,65,00,6c,00,6c,00,33,00,32,00,2e,00,64,00,6c,00,6c,00,2c,00,33,00,\
00,00
"ItemName"="@shell32.dll,-30396"
"MenuText"="@shell32.dll,-30317"
"NonLFNFileSpec"="@shell32.dll,-30319"
[HKEY_CLASSES_ROOT\Folder\ShellNew\Config]
"AllDrives"=""
"IsFolder"=""
"NoExtension"=""