[FIXED] “Extend Volume” Grayed Out in Windows 10/11 | Can’t Use Unallocated Space

In this video we explain why Extend Volume is greyed out in Windows 10 and Windows 11, even when you have unallocated space. #windows11 #diskpartition #fix List of commands in video: reagentc /disable List disk Select disk 0 diskpart list partition select partition x detail partition delete partition override Re-create the Recovery Partition list partition select partition x set id= gpt attributes= list volume select volume y remove letter=y exit reagentc /enable Whether you’re trying to extend your C: drive and seeing “Extend Volume is disabled for C drive” or the Disk Management extend volume greyed out problem, we’ll walk you through the causes and solutions step by step. We’ll cover common scenarios like “can’t extend volume Windows 10,” “can’t extend C drive with unallocated space,” or “can’t extend volume Windows 11,” as well as what to do when Extend Volume option not available appears. If you find this video useful, please Like, Share, and Subscribe to GlitchGuru.