Join Date: Jun 2017
Location: Denver CO
Model: GL1500 Aspencade 1980 GL1100 STD Vetter
It's likely encrypted. This is a function of the BIOS, not Windows 10. There's probably some security settings in the BIOS. Once set, that encryption is permanent unless you completely wipe the drive.
A lot of newer machines are doing this in the interest of laptop security, the idea is to prevent access of the system drive by booting any live OS, and to prevent access by removing the system drive and connecting it to another computer.
If you were to pull that system drive out and put in another drive you could most likely see it. Might have to twiddle the security settings in BIOS. Be very careful doing this, you will likely make your system drive unreadable, too. I'd recommend doing a FULL BACKUP of the system drive before doing ANYTHING like this first so your system can be restored if something goes awry.
You won't be able to decrypt the system drive, but making it an external drive and doing a low-level format (wiping EVERYTHING) should restore the drive to out-of-the-box unencrypted state.
1972 CL-350 (1980-1988) sold
1978 Suzuki GS-550 (1985-2005) sold
1977 GL1000 (2002-2006) sold
1980 GL1100 STD Vetter (2005-)
1993 GL1500 Aspencade (2017-)
1983 Trav-Lite Camper (2010-)