Why I cannot create a New Folder?

First of all you should launch the system file checker. It will remove any faulty files and replace them with Microsoft's. Launch the terminal (cmd) as the administrator and type in sfc /scannow The tool will scan the system for any errors.

However, if the problem persists after the checkup and fixes things get more complicated. 1. Backup your registry before modifying it! 2. Copy text in italic to a new Notepad document: _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"=""_

4. Once you're finished copying, save the file on your desktop as NewFolder.reg
5. Close Notepad.
6. Double click on the NewFolder.reg. Confirm by allowing Windows to add this information to the registry.
7. Reboot.

Hope it helps!