OK! You’d better provide us with much more information about your problem next time. What version of Windows do you use? Is there any free space on the same physical drive with this system partition?
If you do have free space there and you are also using Windows7 or 8, you can directly try to open Disk Management, shrink or delete a partition with free space and right click this system partition to “extend” it there. But, if the “extend” option doesn’t work, a partition resizing tool may help you out, like GParted, IM-Magic Partition Resizer Free and EaseUS Partiton Master and more.
But, if you are using Windows XP, you may have to choose the partition resizing tools.
But, if unfortunately, you do have no any free pace there, you may have to buy a larger drive.
Overall, no matter what way you choose to use, never forget to back up all partition data well in case of data loss.
Edited by Andy45, 19 May 2014 - 01:37 AM.