Making a pen drive bothable is possible in xp, Windows7, Windows8 or Windows10 operating system. Formatting a computer to install fresh Windows OS with a CD/DVD drive is not very good because it takes too much time to install fresh Windows operating system. There can also be a problem for many people that CD/DVD drive doesn’t work properly. So this can be a problem for them. Today laptop or desktop comes many USB ports. So there is no need of CD/DVD drive to format a system. Formatting is very fast and easy with flash drive/pen drive and also no software is required for this method. Windows7, Windows8 or Windows10.