If you have several primary partitions, and contains two or more operating systems you should specify one to be the boot partition. Because of this, one partition should be set as active. As a rule, a disk can have only one active partition.

As Partition Magic alternative, EASEUS Partition Manager Home Edition is a FREE comprehensive hard disk partition management software to let you enjoy free with all the powerful functions: Resize and Move partitions, Create, Delete and Format partitions, Hide and Unhide partitions and much more. What's more, the freeware works perfectly with hardware RAID and Windows 2000/XP/Vista Operating Systems.

If you want to set an active partition, you just need to do as follows:

1. Launch the software. Select a primary partition to set as active from the list in the main window of EASEUS Partition Manager.

2. Select Partitions > Advanced > Set Active.

Before you make a partition active, you must make sure it is formatted and contains an operating system. Otherwise your PC cannot boot from this partition!

3. By clicking OK, you will add the pending operation of setting active partition.

If you set a partition as active and there was another active partition on the disk, it will be unset automatically. This might also prevent your PC from booting.

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