In the browser on your windows machine, go to xxx.xxx.xxx.xxx/tt-rss/install (substituting the appropriate IP address for xxx.xxx.xxx.xxx ) For example, I chose the address 192.168.1.131 so I navigate to 192.168.1.131/tt-rss/install as shown below. Click on "Test Configuration"
If everything has gone right up to now, you should see the page shown below. Click on the red "Initialize Database" button.
Now you should seen the page shown below in your browser. Click on "Save configuration" towards the bottom of the screen.
You should see the message shown below indicating that the configuration was successfully saved. Click on the blue "loading tt-rss now" link.
From here you should be able to login as "admin" with password "password". Change that password before setting up access over the internet.
From the "Preferences" option in the menu under Actions, you can create new users: