Okay well while I've made a topic about this before sort of I really am freaking out here I have it narrowed down Ill give all the info i can. Its the Hp Dv1040us. (original part) Here is the part number for Hard Drive : 367787-001 Royce: Here is the part description : Royce: ATA-100 EIDE hard drive - 4,200 RPM, 2.5in form factor, 9.5mm hei ght So here is some info about the computer http://h10032.www1.hp.com/ctg/Manual/c00636251.pdf go to page 92-93 it works with a variety of their hard drives. It says 5400Rpms on 92 :s so does that mean it supports it BAHHH! okay so look this website offers a perfect match but I never heard of it.http://www.getpartsonline.com/80gbhd-pres-v2000.html http://www.getpartsonline.com/60gbhd-pres-v2000.html So i was thinking I should go with newegg because I know there good. here is the page for them. http://www.newegg.com/Product/Product.aspx?Item=N82E16822149048 what I need to know is if the newegg hard drive will work or if you fellas/ladies have bought from them I have noticed they have older parts for the same price they would have costed when they were first introduced(look at the Geforce 6800gt $350 :s, so it makes me a little iffy.