So i bought my copy of windows 7 with the students special for $30 at the beginning of the year. The thing is about that special is that there was no physical copy given to me; it was all downloads and ISO files. I am now needing to format my hard drive due to bugs and overall slowness and was wondering if i can boot widows 7 with an ISO file burned to a DVD? And will my key work a second time? Also, if anyone can help me with actually formatting my hard drive and all that, i would greatly appreciate it.