So I just got a new computer at work, a Lenovo Thinkpad W540. The first thing I need to do with it is remove the Windows 8 OS that it came with and replace it with Windows 7 and Linux in a dual-boot configuration. I went to start that process and (after a bit of fiddling around to get it be able to boot from a DVD) found that there are already 5 partitions on the hard drive. I was expecting the main partition and a recovery partition, but not the other three. There are two recovery partitions (one is only 1 GB and has some Windows something or other on it; maybe it has the recovery environment?), the main partition, the EFI partition, and another Microsoft reserved partition. I'm tempted to just delete them all and start over as if it's a new drive, but I don't want to screw it up. So, can anyone tell me which I need to keep, or can I just wipe it all and start over from scratch? No, I don't need to keep the recovery, as if I ever migrate to Windows 8 I will be using my institutions volume license, not the license it came with.