Error 0x800F081F during .Net framework installation in Server 2012.

There's a repair tool and other possible fixes in the following Google search:

https://www.google.com/search?client=firefox-b-1&ei=W-qIWqi6E6LW5gK1j7DYBg&q=install+Net+Framework+error+message&oq=install+Net+Framework+error+message&gs_l=psy-ab.3..0i8i30k1l2.44802.46095.0.46807.6.6.0.0.0.0.109.599.3j3.6.0....0...1.1.64.psy-ab..0.5.496...0i8i7i30k1.0.2qECe5BNIlY

You version is no longer supported, time to upgrade

1. Before doing anything else, write down the .NET Framework versions which
are already installed:

How to determine which versions of the .NET Framework are installed and
whether service packs have been applied
http://support.microsoft.com/kb/318785

2. Now see Resolution Method 2 in http://support.microsoft.com/kb/923100
(ignore the title). After running the appropriate/needed tool, (re)install
all .NET Framework versions manually using the download links on the page.

You can try to uninstall .net framework by using .net framework uninstaller and then try to install .net framework 3.0 or above
You can also use the following link:
http://support.microsoft.com/kb/908077

Hi there,

the error codes that you have mention is related to windows update of Microsoft .net framework.

To troubleshoot this issue, I suggest we first perform these steps:

Step 1: Download Microsoft Windows Installer CleanUp utility
====================================
1. Visit:
http://download.microsoft.com/downlo...BD/msicuu2.exe
2. Save the file to your computer.
3. Right click "msicuu2.exe", click "Run as administrator" and follow the
wizard to install this tool on your computer.

Step 2: Remove .NET Framework
========================
1. Click Start ->All Programs->Windows Installer Clean Up, click Allow.
2. See if you can find .Net Framework software. If so, remove them.

After that, please restart the computer and perform the following
suggestions to reinstall .NET framework 1.1 and the updates for it.

Step 3: Install .NET Framework 1.1 Redistributable Package and related updates
==================================================
1. Please download the Microsoft .NET Framework Version 1.1 Redistributable
Package from the following link and save it to the C drive (C:\)

1) Microsoft .NET Framework Version 1.1 Redistributable Package

http://download.microsoft.com/downlo...6/dotnetfx.exe

2) Microsoft .NET Framework 1.1 Service Pack 1

http://download.microsoft.com/downlo...867460-X86.exe

3) Security Update for Microsoft .NET Framework, Version 1.1 Service Pack 1
(KB928366)

http://www.download.windowsupdate.co...d81a178b15.exe

4) .NET Framework 1.1 Service Pack 1 SYSTEM.WEB.DLL and MSCOREE.DLL Security
Update for Windows Vista (KB929729)

http://download.microsoft.com/downlo...929729-X86.exe

Please follow the steps above and if still problem persist please lets us know

Regards,

Om

This issue may occur if a Microsoft .NET Framework file is being used when you try to install Office 2003. For example, this issue may occur if the Mscoree.dll is being used when you try to install Office 2003.

To work around this issue, restart the computer. Alternatively stop Windows Installer.

If these actions do not resolve the problem, repair the existing installation of the .NET Framework. Alternatively troubleshoot .NET Framework installation issues.

For more information about how to restart the computer and about how to stop Windows Installer, click the following article number to view the article in the Microsoft Knowledge Base:
308096 (http://support.microsoft.com/kb/308096/ ) BUG: Error 1935 during install of the .NET Framework For more information about how to repair an existing installation of the .NET Framework and about how to troubleshoot .NET Framework installation issues, click the following article numbers to view the articles in the Microsoft Knowledge Base:
306160 (http://support.microsoft.com/kb/306160/ ) How to repair an existing installation of the .NET Framework 824643 (http://support.microsoft.com/kb/824643/ ) How to troubleshoot Microsoft .NET Framework 1.1 installation issues in Windows XP or in Windows 2000 For more information, click the following article number to view the article in the Microsoft Knowledge Base:
926804 (http://support.microsoft.com/kb/926804/ ) Error message when you try to install a 2007 Office program: "Error 1935. An error occurred during the installation of assembly component" APPLIES TO

• Microsoft Office Small Business Edition 2003
• Microsoft Office Standard Edition 2003
• Microsoft Office Student and Teacher Edition 2003
• Microsoft Office Professional Edition 2003
• Microsoft Office 2003 Personal Edition
• Microsoft Office Basic Edition 2003

Please donot forget to rate these suggestions.

Windows Update error code "0x643" and Windows Installer error code "1603" are generic error codes. Typically, these error codes mean that the update was not installed. These errors codes are usually caused by a corruption in the .NET Framework installation or by an inconsistency on the MSI database state.


Method 1: Manually remove and reinstall .NET Framework loadTOCNode(2, 'resolution'); To manually remove and reinstall the .NET Framework, follow these steps:

1. Remove the .NET Framework.
   1. Click Start, and then click Control Panel.
   2. Double-click Add or Remove Programs.
   3. Note each version of the .NET Framework that is already installed on the computer. Then, uninstall all the versions of the .NET Framework.
   4. When you are prompted, restart the computer.
2. Use the Windows Installer CleanUp Utility to clean up the MSI database state for all the versions of the .NET Framework.
   1. Download the Windows Installer CleanUp Utility. The following file is available for download from the Microsoft Download Center:
      Download the Windows Installer CleanUp Utility package now. (http://download.microsoft.com/download/e/9/d/e9d80355-7ab4-45b8-80e8-983a48d5e1bd/msicuu2.exe)
      
      For more information about how to download Microsoft support files, click the following article number to view the article in the Microsoft Knowledge Base: 119591 (http://support.microsoft.com/kb/119591/ ) How to obtain Microsoft support files from online services Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help prevent any unauthorized changes to the file.
   2. Install the Windows Installer CleanUp Utility as an administrator or as a user account that is a member of the local Administrators group.
   3. Click Start, point to All Programs, and then click Windows Install Cleanup.
   4. In the Windows Installer CleanUp Utility, remove all Windows Installer applications for the .NET Framework.
3. Restart the computer.
4. Download and then reinstall all the versions of the .NET Framework that were previously installed on the computer.
   
   To download the .NET Framework 1.0, visit the following Microsoft Web site: http://www.microsoft.com/downloads/details.aspx?FamilyID=d7158dee-a83f-4e21-b05a-009d06457787&DisplayLang=en (http://www.microsoft.com/downloads/details.aspx?FamilyID=d7158dee-a83f-4e21-b05a-009d06457787&DisplayLang=en) To download the .NET Framework 1.0 Service Pack 3, visit the following Microsoft Web site: http://www.microsoft.com/downloads/details.aspx?familyid=6978D761-4A92-4106-A9BC-83E78D4ABC5B&displaylang=en (http://www.microsoft.com/downloads/details.aspx?familyid=6978D761-4A92-4106-A9BC-83E78D4ABC5B&displaylang=en) To download the .NET Framework 1.1, visit the following Microsoft Web site: http://www.microsoft.com/downloads/details.aspx?familyid=262D25E3-F589-4842-8157-034D1E7CF3A3&displaylang=en (http://www.microsoft.com/downloads/details.aspx?familyid=262D25E3-F589-4842-8157-034D1E7CF3A3&displaylang=en) To download the .NET Framework 1.1 Service Pack 1, visit the following Microsoft Web site: http://www.microsoft.com/downloads/details.aspx?familyid=A8F5654F-088E-40B2-BBDB-A83353618B38&displaylang=en (http://www.microsoft.com/downloads/details.aspx?familyid=A8F5654F-088E-40B2-BBDB-A83353618B38&displaylang=en) To download the .NET Framework 2.0, visit the following Microsoft Web site: http://www.microsoft.com/downloads/details.aspx?FamilyID=0856eacb-4362-4b0d-8edd-aab15c5e04f5&DisplayLang=en (http://www.microsoft.com/downloads/details.aspx?FamilyID=0856eacb-4362-4b0d-8edd-aab15c5e04f5&DisplayLang=en) To download the .NET Framework 2.0 Service Pack 1, visit the following Microsoft Web site: http://www.microsoft.com/downloads/details.aspx?familyid=79BC3B77-E02C-4AD3-AACF-A7633F706BA5&displaylang=en (http://www.microsoft.com/downloads/details.aspx?familyid=79BC3B77-E02C-4AD3-AACF-A7633F706BA5&displaylang=en) To download the .NET Framework 3.0, visit the following Microsoft Web site: http://www.microsoft.com/downloads/details.aspx?familyid=10CC340B-F857-4A14-83F5-25634C3BF043&displaylang=en (http://www.microsoft.com/downloads/details.aspx?familyid=10CC340B-F857-4A14-83F5-25634C3BF043&displaylang=en) To download the .NET Framework 3.0 Service Pack 1, visit the following Microsoft Web site: http://www.microsoft.com/downloads/details.aspx?familyid=EC2CA85D-B255-4425-9E65-1E88A0BDB72A&displaylang=en (http://www.microsoft.com/downloads/details.aspx?familyid=EC2CA85D-B255-4425-9E65-1E88A0BDB72A&displaylang=en) To download the .NET Framework 3.5, visit the following Microsoft Web site: http://www.microsoft.com/downloads/details.aspx?familyid=333325FD-AE52-4E35-B531-508D977D32A6&displaylang=en (http://www.microsoft.com/downloads/details.aspx?familyid=333325FD-AE52-4E35-B531-508D977D32A6&displaylang=en)
5. When you are prompted, restart the computer.

Note When you have reinstalled all the versions of the .NET Framework, you can use Windows Update to check for updates to the .NET Framework.

try to complete uninstall .net framework and install it again or get the latest copy of .net framework to install 3.5 latest version already available for download

The error message appears due to a faulty dot net framework installation on the system.

Perform the below mentioned steps in order to fix the issue.

· Uninstall the Dot Net Framework 2.0 from the system from the add/remove programs section in add/remove programs if the OS is XP.
· Else you can also download the Aaron-Stebner's .Net Framework Setup Cleanup Utility from the website: http://www.raymond.cc/blog/archives/2008/12/02/uninstall-microsoft-net-framework -with-aaron-stebner-cleanup-tool/
· On this website, guide the customer click on the Hyperlink [Download .Net Framework Setup Cleanup Utility]
· Save the utility and run it. When given the list of options, choose Dot net framework 2.0.
·Follow the prompts to uninstall the .Net framework 2.0
·Restart the system.
·Download the .Net framework 2.0 from the website:
http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=0856eacb-4362-4b0d-8edd-aab15c5e04f5
· When prompted, save the file and then run it. [Don’t try to run the file without saving it; else you would get an error message
Error 0X80131107
Error Code 25015.
·After the installation of the .Net framework 2.0, check the AIO Home Center again.

Best of Luck
Saj