Here are the specs for your HP Pavilion g4-1315dx Notebook Computer. According to the specs, this model shipped from the factory with Windows 7 Home Premium (64-bit) installed. Additionally, this model didn't ship with a Bluetooth adapter and will require the use of a USB Bluetooth dongle to support this feature.
Windows 7 64-bit drivers and software for your computer are located on the HP Pavilion g4-1315dx Notebook PC Drivers page. Please note that the drivers page may not contain all factory installed software and some drivers / software may not successfully install on a "clean" Windows installation. Please see DVD - Windows 7 64b SP1 + Supp 2 Recovery Kit to purchase HP Recovery Discs that will return the computer to a factory like state.
If you have any further questions, please don't hesitate to ask.
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