When attempting to install NAV I can not get past the welcome screen. When I click the install button I receive these two errors.(msiexec.exe file is linked to missing export msi.dll:222) and( c:\windows\system\msiexec.exe. A device attached to the system is not functioning). I have been online with Symantec and tried everything they suggested. Their last reply suggested it is a Windows problem and I should contact Microsoft. Well have you ever tried that? I have downloaded and run the Microsoft Installer Cleanup Utility. I have deleted and re-installed the Microsoft Windows installer. Still get the same errors. Other than this my system runs fine. Any ideas on how to eliminate these errors will be greatly appreciated.