Pc is missing the drivers all of them just disapperd on me?

[captonkid]

windows xp madia center edition 2005 is missing its dvd rom and lightscribe dvd + writer/cd-writer. One day the drivers all went missing. Its like they got deleted from the hard drive and iknow i looked there! need help any ideas? i need the back be4 collage..

 

[iwannaopticalmouse]

Computer Virus maybe? Dont know. My PC knowledge is limited. But I dont know what else would take away drivers and other software related programs.