Last month I have purchased the new branded HP dv pavilion 2500 laptop. This is new branded technology based laptop. It provide the facilities like 14.1 inch display, Intel's core2 Duo processor with the 2 GB Ram. Before few days I have not update the antivirus which is presents in the laptop so, that why the important files presents on this laptop are to be corrupted and the setting may be change due to some reason. Then now this laptop will not be worked very well. Can I restore the factory setting or not please tell me?