Hello I have a notebook with windows 8 OEM. In the past I have experimented with dual-booting other OSs, then deleting them and now I have a few extra partitions in my drive. I was wondering if this community could tell me what partitions are safe to merge to my "working" volume (C: or E: ). I have some screenshots of Disk Management and DiskInternals Linux Reader windows. I think there's a better way of showing You the contents of my volumes, but I don't know what program to use, hope You can recommend me one. I also have a few questions: Is my windows 8 OEM inside my hard drive? For example, if I format my whole hard disk completely, would I lose the OEM? Can I replace my windows 8 OEM with windows 8.1 OEM or even with custom windows 8.1 OEM (for example: fully updated one, if it's possible)? Hope You can help me with this.