I deleted important startup items on my hp entertainment laptop...

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and now my remote works but doesn't launch hp quickplay or windows media center. Is this a program from a disblaed startup item or something else? any help? I'm pretty sure I have deleted a program from the startup menu that disabled this but idk what. can anyone please help? can anyone give me the default startup menu list for hp laptops?
btw windows media center and quickplay launch from the start menu but not from the remote or the quick buttons on the laptop.