Not able to partition C:\ Drive as per needs in Windows 7

I am trying to partition my c drive into 2 drives. My c drive has 412 GB free of 450 GB. I wish to participate as 30 GB: 382 GB. But when i try to shrink volume (by going through My Computer --> Manage --> Disk Management) i see that i can shrink around 200 GB. I believe that we cannot shrink upto certain volume due to unmovable files located.

Hence i tried to defrag the c drive using Windows defrag + http://www.piriform.com/defraggler.

Step 2: I then tried clearing restore files & also disabled hibernation. After doing second step, now it is showing that 0 GB is available for shrinking (= shrinking not possible).

What should i do that could make me happy? I know it is possible but do not remember the steps.

Windows' own disk management utility is really weird sometimes, I can relate.

Easeus offers a free partitioning tool here. I can really recommend it.

Still, use it at your own risk and always look again and again before applying a change, so you understand what you are doing right now.

I would also NOT recommend you to resize it to 30 gb. Make it 60 or even 80. I have filled 60 gigabytes and the Windows folder alone had like 25 GB!

Boot to a Gparted live cd and you should be able to resize your partition and create a new ones. Gparted will be able to move files around as they will not be locked in use by the OS.

Gparted Live, but read and understand FAQ, "Use GParted to Resize the Windows 7 or Vista Partition" mini-howto and Vox Populi (STFW) in common