diff --git a/release-notes/8.0.0/3934.md b/release-notes/8.0.0/3934.md
new file mode 100644
index 0000000000..d6e7dd63e7
--- /dev/null
+++ b/release-notes/8.0.0/3934.md
@@ -0,0 +1 @@
+When installing Forgejo through the built-in installer, open (self-) registration is now disabled by default.
diff --git a/routers/install/install.go b/routers/install/install.go
index b84d77cfc2..8f4fafa6f5 100644
--- a/routers/install/install.go
+++ b/routers/install/install.go
@@ -151,7 +151,7 @@ func Install(ctx *context.Context) {
 
 	form.EnableOpenIDSignIn = setting.Service.EnableOpenIDSignIn
 	form.EnableOpenIDSignUp = setting.Service.EnableOpenIDSignUp
-	form.DisableRegistration = setting.Service.DisableRegistration
+	form.DisableRegistration = true // Force it to true, for the installation, to discourage creating instances with open registration, which invite all kinds of spam.
 	form.AllowOnlyExternalRegistration = setting.Service.AllowOnlyExternalRegistration
 	form.EnableCaptcha = setting.Service.EnableCaptcha
 	form.RequireSignInView = setting.Service.RequireSignInView
diff --git a/templates/install.tmpl b/templates/install.tmpl
index 682e1e6511..6e537d2477 100644
--- a/templates/install.tmpl
+++ b/templates/install.tmpl
@@ -147,6 +147,12 @@
 						<input id="log_root_path" name="log_root_path" value="{{.log_root_path}}" placeholder="log" required>
 						<span class="help">{{ctx.Locale.Tr "install.log_root_path_helper"}}</span>
 					</div>
+					<div class="inline field">
+						<div class="ui checkbox" id="disable-registration">
+							<label data-tooltip-content="{{ctx.Locale.Tr "install.disable_registration_popup"}}">{{ctx.Locale.Tr "install.disable_registration"}}</label>
+							<input name="disable_registration" type="checkbox" {{if .disable_registration}}checked{{end}}>
+						</div>
+					</div>
 					<div class="inline field">
 						<div class="ui checkbox">
 							<label>{{ctx.Locale.Tr "install.enable_update_checker"}}</label>
@@ -227,12 +233,6 @@
 								<input name="enable_open_id_sign_in" type="checkbox" {{if .enable_open_id_sign_in}}checked{{end}}>
 							</div>
 						</div>
-						<div class="inline field">
-							<div class="ui checkbox" id="disable-registration">
-								<label data-tooltip-content="{{ctx.Locale.Tr "install.disable_registration_popup"}}">{{ctx.Locale.Tr "install.disable_registration"}}</label>
-								<input name="disable_registration" type="checkbox" {{if .disable_registration}}checked{{end}}>
-							</div>
-						</div>
 						<div class="inline field">
 							<div class="ui checkbox" id="allow-only-external-registration">
 								<label data-tooltip-content="{{ctx.Locale.Tr "install.allow_only_external_registration_popup"}}">{{ctx.Locale.Tr "install.allow_only_external_registration_popup"}}</label>