I just installed Windows 10 on my new PC build. I have a PCIe M.2 SSD as well as a SATA HDD installed. In hindsight I probably should have disconnected the HDD until Windows was installed on the SSD. Now I have a System Reserved partition on my HDD, as well as two other unallocated partitions. One of the other ones I can format and use, the other I can't touch. I can give the System Reserved partition a drive letter but can't delete the volume there either. Even DISKPART will not touch this drive (output: Virtual Disk Service error: Clean is not allowed on the disk containing the current boot, system, pagefile, crashdump or hibernation volume).
Note that there is nothing in this system reserved partition.
Is there anything I can do to rectify this without having to fully wipe and reinstall Windows on the SSD? I'm not even sure that reinstalling Windows on the SSD with the HDD disconnected will fix it... It's already set up as a locked system volume. Is there a Windows 10 system protection feature that can be disabled to workaround this?