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Home > Success Center > Failover Engine (FoE) > Installing Windows 2008 R2 SP1 on a FoE server results in a system mismatch

Installing Windows 2008 R2 SP1 on a FoE server results in a system mismatch

Created by Justin Wyllys, last modified by MindTouch on Jun 23, 2016

Views: 12 Votes: 0 Revisions: 13


This article provides troubleshooting steps when a system mismatch error occurs during Windows 2008 R2 SP1 single server installation. 


  • FoE all versions


Installing Windows 2008 R2 SP1 on a single FoE Server results to a system mismatch. Using Configuration Wizard to failover to a secondary server to initiate a SP1 install is unsuccessful.


  1. On the primary server, use the Configure Server wizard to set the role to Passive,and then click Save. 
    Note: Do not change the identity. 
  2. On the secondary server, open a RDP session. 
  3. Use the Configure Server wizard to set the role to Active, and the click Save. 
    Note: Do  not change the identity. 
  4.  Restart both machines. 
    Note: The secondary machine should appear as the active server.
  5. Stop FoE on both machines. To do this: 
    1. Right-click the FoE icon in the system tray. 
    2. Click Shutdown group, and then stop protected applications. 
  6. On the secondary server, set the FoE service to Disabled.
  7. Apply the Windows 2008 R2 SP1 service pack on the secondary server.
  8. Restart the secondary server.
  9. Once the secondary server is back online, set the FoE service to Automatic.To do this:  
    1. Open CMD, click the FoE icon, and then select Properties
    2. On the General tab, change the Startup type field to Automatic, and then click OK. 
  10. Right-click the FoE icon in the system tray, and then select Start Group.
  11. Once FoE is back online, and the necessary changes have been applied,  Set the Primary server role to Active. Do this through the FoE manager console.


Refer to the following KB for applying updates: 

How to Apply Operating System (OS) Patches or Hotfixes with Minimal Interruptions

Last modified
19:29, 22 Jun 2016