If I double click on a folder search window opens. How to correct this?

Quick Fix

• Click Start->Run 
• Type regsvr32 /i shell32.dll

If this doesn't work try the following

1. Start -> Run
2. Type Regedit
3. Navigate to
   HKEY_CLASSES_ROOT \ Directory \ shell
   In the right-pane, locate and click the (Default) value
   Select Edit menu
   Click Modify
   Locate Value data box
   Type the word none
   Click OK
4. Navigate to HKEY_CLASSES_ROOT \ Drive \ shell
   In the right-pane, locate and click the (Default) value
   Select Edit menu
   Click Modify
   Locate Value data box
   Type the word none
   Click OK
5. Exit Registry Editor.