I have gotten trojans and viruses somehow and the windows version is enterprise. I wish to install Win 8.1 from pendrive. Since I don't have an external backup storage, I created a new partition of 232 GB as drive D and moved all my data I wanted to backup in it. Is there a way I can install Win 8.1 on C drive and then get access to drive D after installation and be able to use data inside it?