I accdently deleted my pci bus 2 device 5 function 3 on my hp laptop

i need help!!!! not sure what or how i did it but i deleted 4 pci bus devices and something called acpi compliant system comprocessor device. now my sound is gone, i cant change my background, i cant set my computer back, i just keep getting error messages about base system devices missing files....
can anyone help me???
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More about accdently deleted device function laptop
  1. check on hp with your system name and model there should be something to test you system and help you fix what is missing http://h10025.www1.hp.com/ewfrf/wc/siteHome?lc=en&cc=us&jumpid=ex_r602_go/hholeftnav/dp/support
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