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Error: "Encountered an improper argument" or Microsoft .NET Framework error: "Unhandled exception has occurred..."

Issue

Errors occur when trying to open up graphics in Vista Workstation similar to these:

Microsoft .NET Framework

Unhandled exception has occurred in a component in your application. If you click Continue, the application will ignore this error and attempt to continue.

A generic error occurred in GDI+.

TAC Vista Workstation

Encountered an improper argument.

Environment

  • Windows 7
  • Windows XP
  • Vista
  • TGML

Cause

Installing Windows XP on a machine that came pre-installed with Windows 7 has been observed to cause this problem.

Resolution

Computers that are sold with Windows 7 pre-installed typically have hardware that is optimized for Windows 7 and often experience a variety of problems when they are re-imaged to Windows XP.

The best solution is to re-install Windows 7. TAC Vista 5.1.4 and newer is compatible with Windows 7 as well as some third-party LNS network tools (check manufacturer's websites for more information). Windows 7 Professional, Ultimate and Enterprise can run programs using "XP Mode". XP Mode is a separate download available for free from Microsoft's website.

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