Hi everyone, I recently clean installed the latest version of Ubuntu on my laptop, I run a dual-boot system by the way. Before that, I installed a software Easy BCD to remove the GRUB. It went very well. Then, I removed my Ubuntu partition and merged it with the existing Disk C. Afterwards, I installed Ubuntu without creating a new partition, instead I opted for "install Ubuntu alongside Windows 10" and I was able to allocate the partition for Ubuntu. Again, it went well. However, I noticed that my disk D went missing when I tried to defrag my disk today. It only shows disk C. Yet, my disk D does still exist as I can use it to access my personal files. What should I do to retrieve my disk D back on the disk defragment menu? Any help or suggestion is appreciated. Thanks beforehand.