From the Configuration Manager I get the error:
The request failed or the service did not respond in a timely fashion.
Consult the Event Log or other applicable error logs for details
From Services I get:
Windows could not start the SQL Server Integration Services 10.0 service on local computer.
Error 1053: The service did not respond to the start or control request in a timely fashion.
The Application Event Log (Event ID 70):
Microsoft SSIS Service failed to start.
Error: Configuration system failed to initialize