If users are running Windows Vista, Windows 7, Windows 8/8.1, Windows 2008, or Windows 2012, take the following operations:
1. Right click the icon “Computer” on desktop, choose “Manage” from the shortcut menu, and click “Disk Management” which is under the “Storage” item to open system snap-in partitioning tool:
2. Right click a NTFS partition which is full of unused space and choose “Shrink Volume” from the popup list to create an unallocated space. Note: 32 bit Windows 10 needs 16GB disk space at least while 64 bit Windows 10 needs 20GB. Then, create a new partition via the function “New Simple Volume”.
After the new partition is created, users can install Windows 10 to it. Well then, how about dual booting Windows 10 under Windows XP or Windows Server 2003 whose Disk Management cannot shrink a partition? Users need the help of third party partitioning freeware, MiniTool Partition Wizard for example.
How to Partition Hard Disk with MiniTool Partition Wizard
Firstly, download and install the free partitioning tool to computer and run it to get its main interface:
Then, select a partition which is filled with free space and choose “Move/Resize Partition” from the left pane to shrink it.
Next, drag the border of partition handle to shorten it so as to release unallocated space, and then click “OK” to go back to the main interface:
Now we can see a 126.52 GB unallocated space. Please select it and choose “Create Partition” from the left pane to get the interface below:
Here, please assign partition label, partition type, file system, drive letter, and cluster size for the new partition, appoint partition size and partition location, and click “OK” to return to the main interface again. Note: the new partition should be primary, because the second Windows OS can not be installed on a logical partition in Windows XP and Windows Server 2003.
At last, click “Apply” button on the top to perform shrinking partition and creating partition, and after application we are successful to create a partition for Windows 10.
Now, users would know how to partition hard disk before installing Windows 10. Take different method under different Windows platform, and then install the new Windows operating system to your PC.