Fixes the user password validation to ensure it obeys what the membership provider's are configured for.

src/Umbraco.Web.UI.Client/src/installer/steps/user.controller.js

@@ -1,4 +1,15 @@
-angular.module("umbraco.install").controller("Umbraco.Install.UserController", function($scope, installerService){
+angular.module("umbraco.install").controller("Umbraco.Install.UserController", function($scope, installerService) {
+    
+    $scope.passwordPattern = /.*/;
+    if ($scope.installer.current.model.minNonAlphaNumericLength > 0) {
+        var exp = "";
+        for (var i = 0; i < $scope.installer.current.model.minNonAlphaNumericLength; i++) {
+            exp += ".*[\\W].*";
+        }
+        //replace duplicates
+        exp = exp.replace(".*.*", ".*");            
+        $scope.passwordPattern = new RegExp(exp);
+    }
 
 	$scope.validateAndInstall = function(){
 			installerService.install();

src/Umbraco.Web.UI.Client/src/installer/steps/user.html

@@ -27,8 +27,15 @@
 				<div class="control-group">
 					<label class="control-label" for="password">Password</label>
 					<div class="controls">
-						<input type="password" name="installer.current.model.password" ng-minlength="8" required ng-model="installer.current.model.password"  />
-						<small class="inline-help">Atleast 8 characters long</small>
+					    <input type="password" name="installer.current.model.password" 
+					           ng-minlength="{{installer.current.model.minCharLength}}" 
+					           ng-pattern="passwordPattern"
+                               required 
+                               ng-model="installer.current.model.password"  />
+					    <small class="inline-help">At least {{installer.current.model.minCharLength}} characters long</small>
+					    <small ng-if="installer.current.model.minNonAlphaNumericLength > 0" class="inline-help">
+					        At least {{installer.current.model.minNonAlphaNumericLength}} symbol{{installer.current.model.minNonAlphaNumericLength > 1 ? 's' : ''}}
+					    </small>
 					</div>
 				</div>
 

src/Umbraco.Web/Install/InstallSteps/NewInstallStep.cs

@@ -72,10 +72,25 @@ namespace Umbraco.Web.Install.InstallSteps
             admin.Username = user.Email.Trim();
 
             _applicationContext.Services.UserService.Save(admin);
-
+            
             return null;
         }
 
+        /// <summary>
+        /// Return a custom view model for this step
+        /// </summary>
+        public override object ViewModel
+        {
+            get
+            {
+                return new
+                {
+                    minCharLength = Membership.Providers[Constants.Conventions.User.UmbracoUsersProviderName].MinRequiredPasswordLength,
+                    minNonAlphaNumericLength = Membership.Providers[Constants.Conventions.User.UmbracoUsersProviderName].MinRequiredNonAlphanumericCharacters
+                };
+            }
+        }
+
         public override string View
         {
             get { return RequiresExecution(null)

src/Umbraco.Web/Install/Models/InstallSetupStep.cs

@@ -57,6 +57,12 @@ namespace Umbraco.Web.Install.Models
         [DataMember(Name = "view")]
         public virtual string View { get; private set; }
 
+        /// <summary>
+        /// The view model used to render the view, by default is null but can be populated
+        /// </summary>
+        [DataMember(Name = "model")]
+        public virtual object ViewModel { get; private set; }
+
         [DataMember(Name = "description")]
         public string Description { get; private set; }