When installing Windows 7 on an empty or new hard disk or if you get a preinstalled Windows 7, you will find two partitions on your hard disk. One 100 MB sized reserved partition and the partition for drive C that contains the Windows installation.
Since current operating systems are able to boot from logical drives in an extended partition (that can host multiple logical drives) the maximum of 4 partitions might not be a restriction to you, but you might have other reasons, why you want to reduce the number of partitions.
Deleting the recovery partition is usually not a good idea, since it is useful for recovery and it often contains the recovery environment of Windows, so that you don’t need to start the recovery environment form a Windows CD.
The reserved partition that comes with Windows 7 is used for the boot manager, but the boot manager could as well be placed on the C partition. The advantage of a separate boot partition is that you could keep on booting other operating systems in a multi-boot environment, in case of a corrupt operating system partition.
However here is a step by step guide how to eliminate the boot partition of Windows 7.Please note, that you don’t need to go this way, if you start with a fresh installation of Windows 7!
First you need to boot your computer from the recovery environment!