Problem installing .NET 3.5 on Vista x64 RRS feed

  • Question

  • Having trouble installing .NET 3.5 on Vista x64.  Getting the 1603 code.  I've been working on it all night to no avail.  I managed to repair my 1.1, 2.0, and 3.0 .NET frameworks (they pass the verifier test) but that did not help.  I tried running both the vanilla 3.5 and the 3.5 SP1 as administrator, but that

    My is here:

    Monday, February 15, 2010 10:51 AM


  • Hi Zhan D,

    Thank you for your post.

    I looked into the log files and found the following error message:

    MSI (s) (34:8C) [05:42:36:829]: Product: Microsoft .NET Framework 3.5 SP1 -- Error 1719.The Windows Installer Service could not be accessed. This can occur if the Windows Installer is not correctly installed. Contact your support personnel for assistance.

    It seems that some cause blocks the Windows Installer Service.

    Firstly, please make sure that you're only running one setup at one time.

    Then please check that the Windows Installer service is set to manual but not disable via the following steps:
    1. Click Start, click Run, type services.msc in the Open text box, and then click OK.
    2. In the Services (Local) list, right-click Windows Installer, and then click Properties.
    3. If the Startup type drop-down list is set to a value of Disable, select the Manual option from the Startup type drop-down list, and then click OK.
    4. Click the File menu, and then click Exit.

    If it's already set right, try to repair Windows Installer:

    1. Run regedit (Start > Run > Regedit)
    2. Go to the location
    3. Right click on this key and select "Export" to save the backup .reg file for late use
    4. Open an elevated command prompt. To do this, click Start, click All Programs, click Accessories, right-click Command Prompt, and then click Run as administrator. If you are prompted for an administrator password or for a confirmation, type the password, or click Allow.
    5. Type the following command, and then press ENTER:
      sfc /scannow
      Do not reboot when complete
    6. Double click saved .reg file from working machine and import registry
      settings into Vista.
    7. Reboot
    For more information about System File Checker tool (SFC.exe) usage on Vista see:

    And re-registering the Windows Installer service by typing "msiexec /unregister" and then "msiexec /regserver" in the command prompt.
    Also, the System account should have "Full Control" permissions to the HKEY_CLASSES_ROOT hive of the registry.

    If no avail, I would suggest you to upgrade Windows Installer to the latest Version 4.5.

    Here is a useful KB that could help you to resolve Common "Windows Installer" problems. You could try to do some common methods like enabling Windows Installer Service, reinstalling Windows Installer.

    If the above suggestions don't work, for x64 OS, could you please try the workaround from the following Windows Installer issue?
    Hope this helps! If you have any concern, please feel free to let me know.

    Best regards,
    Yichun Chen

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    • Edited by YiChun Chen Tuesday, February 16, 2010 11:59 AM typo
    • Marked as answer by YiChun Chen Monday, February 22, 2010 5:28 AM
    Tuesday, February 16, 2010 11:58 AM