Arcanum cant be installed

When i try to install arcanum, it always says error 1305 A0015.bik check if the file exists and whatnot. When i go into the folder, hte file is 23 megs, which seems to be right size and I now that this file is a movie so i dont really need it but when i press cancel, it stops the entire install. My brother installed Arcanum on his computer with no problems, except that on his laptop it didnt work. The specs for my computer are

AMD Athlon 2500+ XP ~ 1.84 Ghz
512 MB RAM
128 MB Geforce FX 5200
XP Pro SP2

the OS is the same as my brothers so it isnt that and the preferred specs for a computer are like half of this one. I really feel like playing Arcanum again and i really wan to sort this thing out so i can get to playing ASAP. If someone could please shed some light on this, i would truly be thankful