There are multiple ways to repair a solution:

Repair the install from Symantec Installation Manager:

• Browse to the following file, right click and "Repair"
  • Program Files\Altiris\Symantec Installation Manager\Installs\Altiris\Symantec_pcAnywhereSolution <latest version>. msi

Manual repair:

• Open up a Command prompt "As Administrator"
  
  • Browse to Program Files\Altiris\Symantec Installation Manager\Installs\Altiris
  • Run msiexec.exe /f "Symantec_pcAnywhereSolution <latest version>. msi"
• When that completes, change directory to <Install dir>\Altiris\Notification Server\Bin
  • Run AexConfig.exe /configure <installDir>\Altiris\pcA\Config\pcA.config
  • Run AexConfig.exe /configure <installDir>\Altiris\pcA\Config\pcA_Upgrade.config