In the following link you can find the cq40 series laptop you can select the model of yours and download the driver for required operating system http://h20000.www2.hp.com/bizsupport/TechSupport/ProductList.jsp?lang=en&cc=us&taskId=135&prodTypeId=321957&prodSeriesId=3752105
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In the following link you can find the cq40 series laptop you can select the model of yours and download the driver for required operating system
http://h20000.www2.hp.com/bizsupport/TechSupport/ProductList.jsp?lang=en&cc=us&taskId=135&prodTypeId=321957&prodSeriesId=3752105