Having a little problem

My USB ports are not reading anything I put into them whenever I plug anything in to one of my 3 USB ports all I get is unknown device no driver install nothing my USB controller also has a yellow triangle next to it i am thinking that is my problem I can't get on the internet to download anything because its a fresh install of windows 7 ultimate from an iso file I burned to disc my laptop is a HP pavilion g7 2269wm I downgraded from windows 8 last time I installed windows 7 my USB ports all worked fine

Thanks for your reply my only question is you can burn executable files to a CD never done it that's why I'm asking my CD drive works I'm glad it does never had any problems last time I installed windows 7

OK cool thanks for your help I'm glad my computer is dual booted Linux comes in handy when having windows issues

It might I'm not sure I am planning on adding a second hard drive to my computer when I get paid I found a optical hard drive caddie that replaces my CD drive and has an adapter that plugs in where my CD drive used to can't wait till payday