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Windows tip of the week

Create a new partition by shrinking a disk volume


By Ed Bott


Most modern PCs have a single disk, formatted with a single primary partition that contains both system files and data.


The best time to partition a hard drive is when you first set it up, but it's also possible to do so after the fact, nondestructively. For example, you might want to create some empty space on the system drive so you can install a fresh copy of Windows in a dual-boot configuration.


To make this configuration possible, open the Disk Management console, Diskmgmt.msc. (In Windows 10, you can find this command on the Quick Link menu by pressing Windows + X.)


In Disk Management, find the drive you want to customize, right-click the bar containing the primary (C:) volume, and then click Shrink Volume. Disk Management queries the volume to determine how much space is available and then displays a dialog box showing the maximum shrink space available.


Enter the amount of space you want to allocate to a new partition, in MB (1 GB = 1,000 MB), making sure to leave enough free space on your primary partition for normal usage, and then click Shrink.


You can now install a fresh OS on the newly empty space or use Disk Management to create and partition a new volume.

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