Replace the Coresettings.config file with its backup; if the backup is not corrupted:
1. Stop all Altiris Services.
2. Navigate to C:\Program Files\Altiris\Notification Server and open the CoreSettings.config file in a notepad.
3. Check to see if the file is empty or have high ASCII characters scattered through the file. If either is true do the following:
a. Open the CoreSettings.config.backup file and verify that it is not corrupt.
b. Rename the original CoreSettings.config file to CoreSettings.config.old
c. Rename the CoreSettings.config.backup file to CoreSettings.config
4. Close any files that are still open
5. Try to start the Altiris Services.
6. Reattempt to started Solution application again within the management platform.