Hi! I have a strange problem. First of all i'm tired of burning dvds and at "expanding file" phase, the installation stops with the "windows could not copy the files..." bla bla, so i'm trying to install from a usb external hard drive. No problem with booting from the external drive, i can get into windows installation screens with no problem at all. but after i format the partition that i choose to install windows on, right after "copying files.." i get a message of corrupted files that can't be read, "c:\boot", "c:\boot\several files". I've tried this with windows 7 professional x64 and windows 7 professional x86. This only happens when installing from the external usb hard drive, with the dvd it usually stops at 36%... I think that it must be a problem with my destination hard drive, but i don't know... anyone can help me?