Pantallazos azules en w xp

Ultimamente me bienen saliendo pantallazos azules en ordenador portatil TOSHIVA satelite ( dias 24,25,29y 30-1-11, uno por dia ) curiosamente cuande me conecto a Internet por Wifi, antes lo hacia por cable. Creo tener todos los programas al dia y tengo dos navegadores instalados el de google 10.0.64.2 y el W. Explorer 8 , la lectura de informes de W Minidump es ,
   ERROR: Module load completed but symbols could not be loaded for win32k.sys
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***                                                                   ***
***                                                                   ***
***    Your debugger is not using the correct symbols                 ***
***                                                                   ***
***    In order for this command to work properly, your symbol path   ***
***    must point to .pdb files that have full type information.      ***
***                                                                   ***
***    Certain .pdb files (such as the public OS symbols) do not      ***
***    contain the required information.  Contact the group that      ***
***    provided you with these symbols if you need this command to    ***
***    work.                                                          ***
***                                                                   ***
***    Type referenced: nt!_KPRCB                                     ***
***                                                                   ***
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***                                                                   ***
***                                                                   ***
***    Your debugger is not using the correct symbols                 ***
***                                                                   ***
***    In order for this command to work properly, your symbol path   ***
***    must point to .pdb files that have full type information.      ***
***                                                                   ***
***    Certain .pdb files (such as the public OS symbols) do not      ***
***    contain the required information.  Contact the group that      ***
***    provided you with these symbols if you need this command to    ***
***    work.                                                         ...