I have a dell latitude e6410 and somehow the drive got wiped and I am trying to install Windows 7 32bit using a bootable usb, but it keeps asking me to insert installation media, which I do not have. Also, I have the option to upgrade, but cannot do that and have to use custom install. I downloaded some drivers for the computer and put them on another usb, but it keeps saying no drivers found and I cannot install windows without them apparently. Anyone know how to fix this?