Asi nejsi sám s tímto problémem:

I found on another site the solution:
GO TO THIS REG KEY

HKEY_CLASSES_ROOT\directory\shell\

delete any OPEN keys, then go back in to file types and open the file
(not file folder) association settings make explore default then switch
back to open as default.. worked for me winxp mce .

Do the same for
HKEY_CLASSES_ROOT\folder\shell\

Thanks Friends ......... My Problem was sorted with this solution

Quick fix
Click Start, Run and type this command:

regsvr32 /i shell32.dll

Click OK

Manual registry fix
To fix the problem manually, open Registry Editor and navigate to:

HKEY_CLASSES_ROOT \ Directory \ shell

-and-

HKEY_CLASSES_ROOT \ Drive \ shell

In the right-pane, locate and click the (Default) value
Click Modify on the Edit menu
Type the word none in the Value data box, and then click OK
Exit Registry Editor.