Jobs & Education2 mins ago
De Frag
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For more on marking an answer as the "Best Answer", please visit our FAQ.OBonio is exactly right. Is this one hard drive you have split up, or do you have a second hard drive split up into two partitions for a total of three? Can you still access D,E drives? If so then you have a different problem, probably just a setting somewhere. If you cannot see these drives listed when you click on my computer and you do only have one hard drive, you may have to reformat again in order to partition.
You have one physical drive, but if it's partitioned into three logical drives, then each one needs formatted. C is already formatted and Windows will tell you if the other drives need formatted when you try to access them. Also, to defragment you need 15% free space on the drive you're trying to de-fragment.