The issue with partitions

So in my disk management I'm trying to put my C:/ drive back together after a mishap with Ubuntu. I get here. I click "delete partition" upon right clicking the section labelled "Free space", and it tells me that "There is not enough memory on the disk(s) to perform this operation". What does this mean and how do I fix it? o_O

what are you wanting to do with this free space?

Partition Wizard solved the problem. Thank you SO much, cliffordcooley. That's it from me everybody. Have a good week. Good day and God bless.

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