No bootable disk on bootcamp
I'm trying to install windows 8.1 on my mid 2010 MBP via bootcamp but when it reboots and tries to install a black screen appears with the message "no bootable disk found. please insert bootable disk and press any key" or something similar. my dvd drive is busted so i created an iso on my dad's pc and im using a 16gb pen drive with the .iso mounted as well as the support software. any help here?
thanks in advance
edit btw i pressed the alt key to load from the usb and it loaded up until the page where i choose which version of windows to install and it says "no image found" or something similar
MacBook Pro, OS X Mavericks (10.9.5), mid 2010