downloading problems

alright this is whats going on. i'm trying to download a song off of a website and when i first tried i got an error message that mmvcp70.dll was missing so i downloaded it off the internet and unzip the folder and placed it into the the right folder. then i got another error message that i was missing coredll.dll so i downloaded that and did everything to it that i did for the other. after that i got another error message for mmvcr70.dll, downloaded that and everything else. i figured that since i had deleted dell jukebox off my computer that i could just download another version and the problem would be fixed. wrong! i got another error message for mmhttp.dll which i can't seem to find anywhere. what is wrong with my computer that i keep getting these error messages and am unable to download a simple song?