i have a dvd cd-rw drive(philips cdrw/dvd). when i put in a cd, a music or dvd, the cd skips and does not play the cd continously. the cds do not have any scatches on them, and i've had this computer for only about 4 months. i checked the device manager and it says that it is working properly. my computer is an hp dv2000t laptop, and i do watch a lot of dvds on it, so maybe i over used it. do i possibly need to replace it? or maybe i need to clean the lens? anybody have any suggestions?