Issue with .Net Framework 2.0 Installation RRS feed

  • Question

  • Hi,
      I am getting the following error while trying to install .Net framework version 2.0.
      Error 25015. Failed to install assembly 'C:WINNT\Microsoft.NET\Framework\v2.0.50727\Microsoft.Build.Framework.dll' becuase of system error; The system cannot find the file specified.

      I tried renaming 'C:WINNT\Assembly' Folder and 'C:WINNT\Microsoft.NET\Framework\v2.0.50727' (Which are the solutions given in the msdn forums for the same error code) but not succeeded in the installation.

      Can some one help me out in overcoming this error in installing .Net Framework 2.0.

    Thanks & Regards,

    Wednesday, February 25, 2009 11:10 AM


  • What is your Windows version?

    This error sounds like it could be a permission issue for the global assembly cache. Can you please try the following:

    1. Open the %systemdrive% folder (normally this is c:\) in Windows Explorer
    2. Right-click on the Windows folder and choose Sharing and Security
    3. Choose the Security tab
    4. Click the Advanced button
    5. Make sure that Users are listed as having Read & Execute permissions, Administrators have Full Control and SYSTEM has Funn Control
    6. Check the box that says "Replace permission entries on all child objects with entries shown here that apply to child objects"
    7. Click the OK button
    8. Try to install .NET Framework 2.0 again

    If that does not work, can you please try the following:

    1. Download the Filemon utility from and install it
    2. Launch Filemon and press CTRL + L to launch the filter dialog
    3. Check the box to log writes and choose to include msiexec.exe and fusion.dll
    4. While Filemon is running run .NET Framework 2.0 setup and wait for it to fail
    5. Copy and paste the error messages with access denied as the error type and send them to me via email so we can see if we can figure out the root cause

    For more reference, please see the following threads:


    Please remember to mark the replies as answers if they help and unmark them if they provide no help.
    • Marked as answer by Figo Fei Tuesday, March 3, 2009 3:09 AM
    Friday, February 27, 2009 7:13 AM