Here are the specs for your HP Pavilion 15-e007tx Notebook Computer and here is the HP Pavilion 15-e007tx Notebook PC Drivers & Downloads page. Notice that HP is only supporting Windows 8 on this model and only Windows 8 drivers are available on HP's support site. Windows 7 drivers may be hard to come by because this model doesn't have an equivalent model released with Windows 7 installed.
Please post the Windows Device Manager's "Hardware Ids" for any missing or unknown devices as shown in the example below;
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