Open GIt bash from your installed program.

Type  

$ ssh-keygen -t rsa -b 4096 -C "youremail@example.com"
And output generated
Generating public/private rsa key pair.
Enter file in which to save the key (/c/Users/putham/.ssh/id_rsa):
Created directory '/c/Users/putham/.ssh'.
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /c/Users/putham/.ssh/id_rsa.
Your public key has been saved in /c/Users/putham/.ssh/id_rsa.pub.
The key fingerprint is:
SHA256:odTtqkj3SxCQj9vGO7lCabp7qTNQaoMjpulTvI/NMts youremail@example.com
The key's randomart image is:
+---[RSA 4096]----+
|    ..           |
|    .. . .       |
|     oo o .      |
|  . ...o o       |
|.o.  =o S .      |
|*+ o= +. .       |
|=+o+oo.oo        |
|o.+=Oo++         |
|..=X*Eooo.       |
+----[SHA256]-----+