How to Extend a Partition to Fill a Computer Drive

Choose Disk Management from the Computer Management window’s left pane.

The window’s right side displays your disk drives and their partitions. Your C partition is identified by the characters “(C:)”, along with the words “System,” “Boot File,” “Page File,” and other technical verbosity. (It also has a blue line across its top.) The space to the right on your C drive is listed as “Unallocated,” meaning it’s not being used. (It has a black line across its top.) So, your mission is to extend your C partition’s boundaries to grab that unused space.

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