Query Engine Service fails to start with the following message : 'Error 1069: The service did not start due to a logon Failure. '

This behavior can occur for any of the following reasons:

• The password is changed on the account the service is configured to use to log on.
• The password data in the registry is damaged.
• The right to log on as a service is revoked for the specified user account.

To configure the password for the specified user account to match the current password for that user, use the following steps:

1. Click Start, point to Settings, click Control Panel, and then double-click Administrative Tools.
2. Double-click Services.
3. Right-click the Query Engine Service and then click Properties.
4. On the Log On tab, change the password to match the current password for this user in Active Directory
5. Click Apply.
6. On the General tab, click the Start to restart the service.
7. Quit the Services tool.

If the right to log on as a service is revoked for the specified user account, restore the right by performing the following steps:

1. Start the Local Security Settings MMC snap-in (secpol.msc)
2. Expand Local Policies, and then click User Rights Assignment.
3. In the right pane, right-click Log on as a service, and then click Security.
4. Add the user to the policy, and then click OK.
5. Close the Local Security Settings MMC snap-in.