Yes, it is possible to install Windows on a single drive.
Yes, it is possible to install Windows on a single drive.
The BIOS would start from the identical disk no matter which partitions were present. You’d see a display asking you to select an operating system.
Checking if it's correct doesn’t need action. The menu order might shift when you return. Some users report seeing it even after removing another OS, so you may need to clear boot entries or use a clean install.
Typically, when setting up two windows on a single drive, the second installation appears as D: rather than C:.