diff --git a/src/SQLCE4Umbraco/SqlCEInstaller.cs b/src/SQLCE4Umbraco/SqlCEInstaller.cs
index 0d60c20288..8e42c6c3f8 100644
--- a/src/SQLCE4Umbraco/SqlCEInstaller.cs
+++ b/src/SQLCE4Umbraco/SqlCEInstaller.cs
@@ -17,6 +17,7 @@ namespace SqlCE4Umbraco
     /// <summary>
     /// Database installer for an SQL Server data source.
     /// </summary>
+    [Obsolete("The legacy installers are no longer used and will be removed from the codebase in the future")]
     public class SqlCEInstaller : DefaultInstallerUtility<SqlCEHelper>
     {
         #region Private Constants
diff --git a/src/SQLCE4Umbraco/SqlCEUtility.cs b/src/SQLCE4Umbraco/SqlCEUtility.cs
index a1d9cb68ac..ff6905df10 100644
--- a/src/SQLCE4Umbraco/SqlCEUtility.cs
+++ b/src/SQLCE4Umbraco/SqlCEUtility.cs
@@ -6,6 +6,7 @@
  * 
  ***********************************************************************************/
 
+using System;
 using umbraco.DataLayer.SqlHelpers.SqlServer;
 using umbraco.DataLayer.Utility;
 using umbraco.DataLayer.Utility.Installer;
@@ -16,6 +17,7 @@ namespace SqlCE4Umbraco
     /// <summary>
     /// Utility for an SQL Server data source.
     /// </summary>
+    [Obsolete("The legacy installers are no longer used and will be removed from the codebase in the future")]
     public class SqlCEUtility : DefaultUtility<SqlCEHelper>
     {
         #region Public Constructors
diff --git a/src/umbraco.datalayer/SqlHelpers/MySql/MySqlUtility.cs b/src/umbraco.datalayer/SqlHelpers/MySql/MySqlUtility.cs
index 2e48455480..4113c479f6 100644
--- a/src/umbraco.datalayer/SqlHelpers/MySql/MySqlUtility.cs
+++ b/src/umbraco.datalayer/SqlHelpers/MySql/MySqlUtility.cs
@@ -15,6 +15,7 @@ namespace umbraco.DataLayer.SqlHelpers.MySql
     /// <summary>
     /// Utility for an MySql data source.
     /// </summary>
+    [Obsolete("The legacy installers are no longer used and will be removed from the codebase in the future")]
     public class MySqlUtility : DefaultUtility<MySqlHelper>
     {
         #region Public Constructors
diff --git a/src/umbraco.datalayer/SqlHelpers/SqlServer/SqlServerUtility.cs b/src/umbraco.datalayer/SqlHelpers/SqlServer/SqlServerUtility.cs
index 0126de6b82..c434c013ef 100644
--- a/src/umbraco.datalayer/SqlHelpers/SqlServer/SqlServerUtility.cs
+++ b/src/umbraco.datalayer/SqlHelpers/SqlServer/SqlServerUtility.cs
@@ -16,6 +16,7 @@ namespace umbraco.DataLayer.SqlHelpers.SqlServer
     /// <summary>
     /// Utility for an SQL Server data source.
     /// </summary>
+    [Obsolete("The legacy installers are no longer used and will be removed from the codebase in the future")]
     public class SqlServerUtility : DefaultUtility<SqlServerHelper>
     {
         #region Public Constructors
diff --git a/src/umbraco.datalayer/Utility/BaseUtility.cs b/src/umbraco.datalayer/Utility/BaseUtility.cs
index 683ff28d72..06dd4753ab 100644
--- a/src/umbraco.datalayer/Utility/BaseUtility.cs
+++ b/src/umbraco.datalayer/Utility/BaseUtility.cs
@@ -6,12 +6,15 @@
  * 
  ***********************************************************************************/
 
+using System;
+
 namespace umbraco.DataLayer.Utility
 {
     /// <summary>
     /// Base class for utilities that use an ISqlHelper as data source.
     /// </summary>
     /// <typeparam name="S">The SQL helper type.</typeparam>
+    [Obsolete("The legacy installers are no longer used and will be removed from the codebase in the future")]
     public abstract class BaseUtility<S> where S : ISqlHelper
     {
         #region Private Fields
diff --git a/src/umbraco.datalayer/Utility/DefaultUtilitySet.cs b/src/umbraco.datalayer/Utility/DefaultUtilitySet.cs
index a1ab05f287..85e545dbfd 100644
--- a/src/umbraco.datalayer/Utility/DefaultUtilitySet.cs
+++ b/src/umbraco.datalayer/Utility/DefaultUtilitySet.cs
@@ -17,6 +17,7 @@ namespace umbraco.DataLayer.Utility
     /// that operate on data layer level.
     /// </summary>
     /// <typeparam name="S"></typeparam>
+    [Obsolete("The legacy installers are no longer used and will be removed from the codebase in the future")]
     public class DefaultUtility<S> : IUtilitySet where S : ISqlHelper
     {
         #region Private Fields
diff --git a/src/umbraco.datalayer/Utility/Installer/DatabaseVersion.cs b/src/umbraco.datalayer/Utility/Installer/DatabaseVersion.cs
index fc9841cc7a..c70df9c5bd 100644
--- a/src/umbraco.datalayer/Utility/Installer/DatabaseVersion.cs
+++ b/src/umbraco.datalayer/Utility/Installer/DatabaseVersion.cs
@@ -6,11 +6,14 @@
  * 
  ***********************************************************************************/
 
+using System;
+
 namespace umbraco.DataLayer.Utility.Installer
 {
     /// <summary>
     /// Version number of an Umbraco database.
     /// </summary>
+    [Obsolete("The legacy installers are no longer used and will be removed from the codebase in the future")]
     public enum DatabaseVersion
     {
         /// <summary>Database connection unsuccessful.</summary>
diff --git a/src/umbraco.datalayer/Utility/Installer/DefaultInstallerUtility.cs b/src/umbraco.datalayer/Utility/Installer/DefaultInstallerUtility.cs
index a9ba2df617..102ebed580 100644
--- a/src/umbraco.datalayer/Utility/Installer/DefaultInstallerUtility.cs
+++ b/src/umbraco.datalayer/Utility/Installer/DefaultInstallerUtility.cs
@@ -16,6 +16,7 @@ namespace umbraco.DataLayer.Utility.Installer
     /// Base class for installers that use an ISqlHelper as data source.
     /// </summary>
     /// <typeparam name="S">The SQL helper type.</typeparam>
+    [Obsolete("The legacy installers are no longer used and will be removed from the codebase in the future")]
     public abstract class DefaultInstallerUtility<S> : BaseUtility<S>, IInstallerUtility where S : ISqlHelper
     {
         #region Private Fields
diff --git a/src/umbraco.datalayer/Utility/Installer/VersionSpecs.cs b/src/umbraco.datalayer/Utility/Installer/VersionSpecs.cs
index c1237e1e97..3fb6fedf9a 100644
--- a/src/umbraco.datalayer/Utility/Installer/VersionSpecs.cs
+++ b/src/umbraco.datalayer/Utility/Installer/VersionSpecs.cs
@@ -1,3 +1,5 @@
+using System;
+
 namespace umbraco.DataLayer.Utility.Installer
 {
     /// <summary>
@@ -8,6 +10,7 @@ namespace umbraco.DataLayer.Utility.Installer
     /// <remarks>
     /// This also supports checking for a value in a table.
     /// </remarks>
+    [Obsolete("The legacy installers are no longer used and will be removed from the codebase in the future")]
     public struct VersionSpecs
     {
         /// <summary>The SQL statament to execute in order to test for the specified version</summary>
diff --git a/src/umbraco.datalayer/Utility/Table/DefaultField.cs b/src/umbraco.datalayer/Utility/Table/DefaultField.cs
index e248c14a72..a51d30f721 100644
--- a/src/umbraco.datalayer/Utility/Table/DefaultField.cs
+++ b/src/umbraco.datalayer/Utility/Table/DefaultField.cs
@@ -5,6 +5,7 @@ namespace umbraco.DataLayer.Utility.Table
     /// <summary>
     /// Default implementation of the <see cref="IField"/> interface.
     /// </summary>
+    [Obsolete("The legacy installers are no longer used and will be removed from the codebase in the future")]
     public class DefaultField : IField
     {
         #region Public Constructors
diff --git a/src/umbraco.datalayer/Utility/Table/DefaultTable.cs b/src/umbraco.datalayer/Utility/Table/DefaultTable.cs
index ba9bb78d40..040ffb91ed 100644
--- a/src/umbraco.datalayer/Utility/Table/DefaultTable.cs
+++ b/src/umbraco.datalayer/Utility/Table/DefaultTable.cs
@@ -7,6 +7,7 @@ namespace umbraco.DataLayer.Utility.Table
     /// <summary>
     /// Default implementation of the <see cref="DefaultTable"/> interface.
     /// </summary>
+    [Obsolete("The legacy installers are no longer used and will be removed from the codebase in the future")]
     public class DefaultTable : ITable
     {
         #region Private Fields
diff --git a/src/umbraco.datalayer/Utility/Table/FieldProperties.cs b/src/umbraco.datalayer/Utility/Table/FieldProperties.cs
index c809c0c7e6..734b8a8104 100644
--- a/src/umbraco.datalayer/Utility/Table/FieldProperties.cs
+++ b/src/umbraco.datalayer/Utility/Table/FieldProperties.cs
@@ -8,6 +8,7 @@ namespace umbraco.DataLayer.Utility.Table
     /// Properties for a table field.
     /// </summary>
     [Flags]
+    [Obsolete("The legacy installers are no longer used and will be removed from the codebase in the future")]
     public enum FieldProperties
     {
         /// <summary>
diff --git a/src/umbraco.datalayer/Utility/Table/IField.cs b/src/umbraco.datalayer/Utility/Table/IField.cs
index 1cdb29c2f9..a14f0fda50 100644
--- a/src/umbraco.datalayer/Utility/Table/IField.cs
+++ b/src/umbraco.datalayer/Utility/Table/IField.cs
@@ -5,6 +5,7 @@ namespace umbraco.DataLayer.Utility.Table
     /// <summary>
     /// Interface for classes that represent a table field.
     /// </summary>
+    [Obsolete("The legacy installers are no longer used and will be removed from the codebase in the future")]
     public interface IField
     {
         /// <summary>
diff --git a/src/umbraco.datalayer/Utility/Table/ITable.cs b/src/umbraco.datalayer/Utility/Table/ITable.cs
index 5722b13939..8806474f34 100644
--- a/src/umbraco.datalayer/Utility/Table/ITable.cs
+++ b/src/umbraco.datalayer/Utility/Table/ITable.cs
@@ -6,6 +6,7 @@ namespace umbraco.DataLayer.Utility.Table
     /// <summary>
     /// Interface for classes that represent a data source table.
     /// </summary>
+    [Obsolete("The legacy installers are no longer used and will be removed from the codebase in the future")]
     public interface ITable : IEnumerable<IField>
     {
         /// <summary>