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Set active 
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If you have several primary partitions, you must specify one to be the boot partition. For this, one partition can be set as active. As a rule, a disk can have only one active partition. 
 
To set an active partition: 
1. Select a primary partition to set as active from the list in the main window of [/body][smallbold]EaseUS Partition Master[/smallbold][body]. 
2. Select [/body][smallbold]Partitions[/smallbold][body] > [/body][smallbold]Set active[/smallbold][body].  
3. By clicking [/body][smallbold]OK[/smallbold][body], you will add the pending operation of setting active partition.
 
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[image]<03>../res/tip.png[/image][smallbold]<03> Tips:  
 
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[image]<04>../res/mark.png[/image][body]<04> 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! 
 
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[image]<05>../res/mark.png[/image][body]<05> 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. [/body]