Currently Being ModeratedOct 5, 2012 7:34 PM (in response to Marina Pineda)
There is a troubleshooting article at the link, but it is only in English, sorry.
I would try starting up in Safe mode, and dragging the application you installed to the trash. That may be enough to get rid of it.
Currently Being ModeratedNov 8, 2012 7:01 AM (in response to Marina Pineda)
Hola Marina Pineda, ¿Lo solucionastes?