Go to Start/Search and type
event viewer. Double click the results Go to
Windows Logs on the left side, click
System, later click
Application. Look for any instances with a Red X double click it to see what it says. copy the text and paste it here.
Go to Start/Search and type
devmgmt.msc, right click the
devmgmt results and
Run As Administrator. In the Elevated
Device Manager are there any devices with yellow flags? If so, these devices need drivers installed.
This computer only has drivers from HP for
Vista and not Windows 7 You can try installing the Vista driver for you model, but it may not be compatible. We suggest reinstalling Vista.
Software & driver downloads HP Pavilion dv9815nr Entertainment Notebook PC | HP® Support