Errors 1601 and 1603

If during the installation of an extension program . Msi and Windows Live Messenger, you receive one of these errors, probably Windows Installer damaged.
To solve the problem, follow these steps:

  • Download Windows Installer and install on your PC
  • Reinstall Windows Installer by using a command line:
    • Click Start> Run
    • Write msiexec / unreg (Leave a space between "msiexec" and "/ unreg")
    • Click "OK"
  • Repeat this time typing msiexec / regserver (Leave a space between "msiexec" and "/ regserver")
  • Repair Windows:
    • Insert the Windows CD
    • Click Start> Run
    • Write SFC / Scannow (Put a space between "SFC" and "/ scannow")
    • Click "OK" and follow the process