You can download the IOTA wallet for your computer from Github.
This will update to new versions so may not look exactly like the screenshot but make sure you download the exe. Install the software like any other program.
Once installed, you will have two options on accessing the wallet. Host yourself or host using someone else’s server. For beginners, choose the light node option.
Once you have chosen a light node server, you will be able to login using a seed. Learn how to set up you IOTA wallet here.