When installing Windows 7 on a fresh and new HDD with no partitions present, the installation process will create a 100mb partition that is marked as system reserved. This partition is available only for:
Windows 7 Ultimate,
Windows 7 Business
Windows 7 Enterprise ed.
The 100 MB system partition is used primarily as BitLocker partition for BitLocker encryption, and the WinRE (Windows Recovery Environment).
Here is a trick to remove that partition, using Windows 7 own tool, diskpart… Continue reading