I think Minitool partition wizard should be able to do so, it reboots the computer to free up all partitions. I'm pretty sure the free version works fine. If you have a spare drive you could even clone it to there and back, it gives you the option to stretch or reposition partitions. Step 1: You start the MiniTool Partition Wizard software. Step 2: Next, select the drive to fix Unallocated errors and select Extend Partition. Step 3: Then, in the section Take Free Space From you select the drive Unallocated to merge.
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About Merge Partition
Merge Partition function helps users merge two adjacent partitions. It is noteworthy that this function only works for NTFS partitions. If the target partition is formatted with FAT12/FAT16/FAT32 file system, please use Convert FAT to NTFS function of the software to convert the partition to NTFS at first.
How to Merge Partition
Please view the MiniTool Partition Wizard tutorial for partition incorporation here:
Step 1: Choose a preferred way to start partition merging operation from the listed ones:
- Select the source partition and click Merge Partition from left action panel.
- Select the source partition and click Partition from the menu bar. Then, click Merge from the drop-down menu.
- Right click source partition and click Merge from the drop-up menu.
How To Restore Unallocated Partition
Step 2: In this interface, users can find the software has specified the selected partition to be expanded already. So users only need to click Next button to continue.
Unallocated Data Recovery
Step 3: Here, choose the partition which will be included in the previously chosen partition and name the folder which will contain the content of the selected partition. After that, click Finish button to go back to the main interface of the software.
Step 4: In the main interface, check the partition merging effect. If it is as expected, users can click Apply button to confirm.