Why two partitions ?

I have installed the Windows 7 7100 on my hard disk.
During the installation process, I choice only one partition (full hard disk capacity). After the complete installation, without problems, I boot on a CD backup software and I see two partitions.
Do you know why these two partitions and their roles please ?
Thank you for your answer.


Essential Member
You probably have the hidden 100 MB partition.

I thought this happened only with an upgrade.:confused:

Try going to Start > Run, and type diskmgmt.msc and see if it show up here.

Hi Reghakr,
Thank you for your answer.
I have the next partitions :
- System Reserved (system, active, main partition) 100MB
- c: (boot, swap file, main partition) 75MB
Do you explain me what is the purpose of the System Reserved partition plz ?
Thanks for your help

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