Win XP SP 3 - just what .NET versions to install to get to .NET 4 RRS feed

  • Question

  • I'm having real problems getting .NET 4 to install on my XP SP3 machine.  Previously it has had .Net 1, 2, 3, and 3.5 installed with patches.

    If I continue to have problems, I have a disk image that could be reinstalled and repatched.

    My question, in the patching process, is it necessary to install .Net 1, 2, 3, and 3.5 sequentially then .Net 4, or is all that is necessary is .Net 4.

    I am told be my software vendor that I need the full .Net 4 build, not just the .Net 4 Client.

    This "installing over" of versions is something I never recall having been addressed.


    Thursday, May 24, 2012 4:28 PM


  • Although .NET Framework versions 2.0. 3.0 and 3.5 are, effectively, all onr framework (2.0 is the base, full, framework and 3.0 and 3.5 are extensions to 2.0), 4.0 is a separate, complete framework.

    Therefore, you can install 4.0 even if no other .NET Framework versions are installed. Conversely, as the full frameworks are separate, there is no "installing over" another framework version. The complete frameworks install side by side.

    Please try this sequence of steps to get 4.0 installed on your system:

    Follow these steps exactly:

    Before trying to install .NET Framework 4.0, execute this command from an ELEVATED Command Prompt provided by the .NET Framework Team:

    "This issue is likely caused by a bad ACL on assembly\tmp folder. After installing updates, the ACL propagates to installed assembly folders in both 4.0 & legacy GAC.  If those updates were installed by WU or another user, the propagated ACL will prevent install of the same assembly by the current user.

    A work around would be to reset the ACL on GAC dirs.

    for /F %D in ('dir %WINDIR%\assembly %WINDIR%\Microsoft.NET\assembly /s /b /a:d') do takeown /F %D && icacls %D /reset /T"

    After running that command, follow these steps:

    Please follow these instructions exactly:

    1. Download a fresh copy of the standalone installer for .NET Framework 4.0 (full franework):

    2. Also, clear your %temp% directory and disable your AV software.

    The %temp% directory is a reference to the Temp folder associated with the current user. To clear it, do the following:

    Sign on to your system with the Administrator user account you will use to run the installer. Click the Start Orb and type %temp% in the search box. The search results will show the Temp folder you want. Click on the Temp folder to open it in Windows Explorer, then delete the entire contents.

    3. Run the standalone installer from step 1 As Administrator.

    Note: Just using an administrator account is NOT enough. To activate full privileges, you must right-click the installer, then select Run as administrator.

    If the install fails, provide complete install logs as follows:

    Please collect your install logs with this:

    After you run Collect.exe, you'll find in your %temp% directory. Please upload to a public site, like SkyDrive, and post the link here.

    Thursday, May 24, 2012 8:55 PM