Audio and some other devices not working on compaq mini NOTEBOOK

 A certain PCI device failed to install on my system. my pc cannot detect it and i think this has affected the audio and some other vital devices like battery meter, and ajusting the brigtness of the screen. i want to know if the device can be uninstalled and have some other drivers that will make the pc to work normally. The system also refuses to go on hibernation
Recent changes: i installed a PDF fill writer software which i have uninstalled
Name of product: Compaq mini  notebook with serial number CNC0472C51
PRODUCT NUMBER: XE979EA
OPERATING SYSTEM- WINDOWS 7 32 -BIT

Thanks to edgmiw for the solution:
edgmiw wrote:
Run system update and make sure all your Thinkvantage utilities and drivers are installed properly.

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