1. Open the easeus partition master home edition.
2. Click on partition manager.
3. Click on merge at the top of the window.
4. Then select all the partition that you want to merge together as shown below
5. Wait for the check partition dialogue box to be done with its process
6. Please make sure you click on apply before closing the software, the software might restart the system and by the time the system boots back to windows, the partitions would have been merged together.