Can you install windows 10 on a not empty drive?

[Beasty_993]

So can/should you do that? Are there any risks?

 

[Doctor Rob]

You can install on a disk that has stuff on it BUT it will write over the stuff. so I would NOT do it if you want that data.

 

[boju]

When installing Windows on a hdd it's repartitioned. That means the drive is wiped.