Drivers not found

Hello, i'm coming into some problems installing windows 7 into my new rig. The message "device drivers can't be found, install media..." appears when trying to complete the first step of windows installation. I've researched multiple forums for a solution, but i can't seem to get it to find the drivers. Also, i'm installing the windows 7 from a bootable usb. I'm hoping you guys could help me out with my troubles. I really want to get this thing working, so i'm open to all possible fixes.