I have this problem in my environment, but still haven’t quite figured it out. Event log shows error every 30-60 seconds and the error is like this:

Event Type: Error
Event Source: Office SharePoint Server
Event Category: Launcher Service
Event ID: 6102
Date: 8/10/2009
Time: 8:00:00 ÁM
User: N/A

Computer: server1

Description: LoadBalancer.RegisterLauncher failed: Unable to connect to the remote server

Here’s a list of different possible solutions to this problem:

  • Go to the Sharepoint Central Administration -> Operation -> Service Account. Change Load Balancer service account to “Network Service” or “Local Service”
  • Restart the Document Conversion Load Balancer service and Document Conversion Launcher service with services.msc (win+R -> services.msc)
  • Problems with SSP: add more permissions to the SSP user, create new SSP
  • Shutdown Document conversion launcher service and document conversion if you don’t need them
  • Add read/execute permissions for IIS_WPG group to the Inetpub-folder
  • Change IIS Application pool identity for sharepoint to “Local System”