You may receive an "Error 1935" error message when you try to install Visual Studio .NET or Visual Studio 2005


When you try to install Microsoft Visual Studio .NET or Microsoft Visual Studio 2005, you may receive an error message that is similar to the following:
Error 1935.An error occured during the installation of assembly component
Note In this error message, the word "occured" is a misspelling for the word "occurred."


To resolve the problem, follow these steps:
  1. If the Microsoft .NET Framework 1.0 is installed on your computer, remove the .NET Framework 1.0:
    1. Open Control Panel.
    2. If you are using Microsoft Windows 2000, double-click Add/Remove Programs. If you are using Microsoft Windows XP or Microsoft Windows Server 2003, double-click Add or Remove Programs.
    3. In the Add/Remove Programs or
      Add or Remove Programs dialog box, click Microsoft .NET Framework (English) v1.0.3705.
    4. d.If you are using Windows 2000 or Windows XP, click Remove. If you are using Windows Server 2003, click Change/Remove.
  2. In the
    %WINDIR%\Microsoft.NET\Framework folder, right-click the v1.0.3705 folder, and then click Delete to delete the v1.0.3705 folder.

    Note %WINDIR% is a placeholder for the path to the folder where the Microsoft Windows operating system is installed on your computer.
  3. Use the Msizap.exe utility to remove the Windows Installer information for the .NET Framework 1.0.
  4. Obtain the Msizap.exe utility. To do this, download the Microsoft Windows Installer Software Development Kit (SDK).

    For more information about how to download the Windows Installer SDK, visit the following Microsoft Web site:
  5. Follow these steps to use the Msizap.exe utility:
    1. Click Start, click
      Run, type
      cmd, and then click OK.
    2. At the command prompt, change the current directory path to the directory where the Msizap.exe utility of the Windows Installer SDK is located.
    3. At the command prompt, run the following command:
      Msizap TP {B43357AA-3A6D-4D94-B56E-43C44D09E548}
      • B43357AA-3A6D-4D94-B56E-43C44D09E548 is the product code for the .NET Framework 1.0.
      • Special user rights are not required to use the Msizap.exe utility on a Microsoft Windows 95, a Microsoft Windows 98, or a Microsoft Windows Millennium Edition (Me) operating system. However, administrative credentials are required to use the Msizap.exe utility on a Microsoft Windows NT 4.0, a Microsoft Windows 2000, or a Microsoft Windows XP operating system.
    4. Close the command prompt.
  6. Re-install the .NET Framework 1.0.

    To download the .NET Framework 1.0, visit the following Microsoft Web site:
  7. Install Visual Studio .NET.

More Information

If the .NET Framework 1.0 is not installed correctly on your computer, you may notice the behavior that is mentioned in the "Symptoms" section. Therefore, make sure that the installation of the .NET Framework 1.0 is complete before you try to install Visual Studio .NET.


For more information, visit the following Microsoft Developer Network (MSDN) Web sites:For additional information, click the following article numbers to view the articles in the Microsoft Knowledge Base:

320114 How to manually remove Visual Studio .NET 2002 components

320112 PRB: Installation of .NET Framework fails and requires manual removal

308096 BUG: Error 1935 during install of the .NET Framework

839547 You may receive an "Error 1935" error message when you use the Netfx.msi Windows Installer package to install the .NET Framework 1.1