How to install ssl certificates on windows
Steps:
1. Open IIS Manager
Press Win + R, type inetmgr, and press Enter.
2. Select Your Server
In the left Connections pane, click your server name (not a specific site).
3.Open "Server Certificates"
In the Features pane, double-click Server Certificates.
4. Complete Certificate Request
Click "Complete Certificate Request" in the right Actions pane.
Browse to your .cer file.
Enter a friendly name.
Choose Personal as the certificate store.
Click OK.
5. Bind the Certificate to a Site
Go to Sites > Your Site.
Click Bindings on the right.
Click Add or Edit if HTTPS already exists.
Choose https, set IP/port, and select the installed certificate.
Click OK, then Close.
6. Restart the Site (if needed)
Right-click the site > Manage Website > Restart.