Can't open folders after updating to lion

Question

after updating to lion I cant open any folder in the desktop (only the macintosh folder works), not even the finder in the dock works
I am using a 2.4 ghz intel core 2 duo macbook
please help?
  Nombre del modelo:          MacBook
  Identificador del modelo:          MacBook4,1
  Nombre del procesador:          Intel Core 2 Duo
  Velocidad del procesador:          2.4 GHz
  Cantidad de procesadores:          1
  Cantidad total de núcleos:          2
  Caché de nivel 2:          3 MB
  Memoria:          2 GB
  Velocidad del bus:          800 MHz
  Versión de la ROM de arranque:          MB41.00C1.B00

Answer 1

Launch the Console application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ Open LaunchPad. Click Utilities, then Console in the icon grid.
The title of the Console window should be All Messages. If it isn't, select
          SYSTEM LOG QUERIES ▹ All Messages
from the log list on the left. If you don't see that list, select
          View ▹ Show Log List
from the menu bar at the top of the screen. Click the Clear Display icon in the toolbar. Then take one of the actions that you're having trouble with. Select any messages that appear in the Console window. Copy them to the Clipboard by pressing the key combination command-C. Paste into a reply to this message by pressing command-V.
The log contains a vast amount of information, almost all of which is irrelevant to solving any particular problem. When posting a log extract, be selective. A few dozen lines are almost always more than enough.
Please don't indiscriminately dump thousands of lines from the log into this discussion.
Please don't post screenshots of log messages—post the text.
Some private information, such as your name, may appear in the log. Anonymize before posting.