Unable to install .net framework 3.5, receiving error: 1603

Problem solved by adding missing registry keys, thank you very much for taking your time with my problem.

Hi Rayane,

We need to completely uninstall all the remnants of the .NET using the .Net Removal tool, install them in the order that was suggested in the Method 2.

Check the version of Windows Installer that is currently running in the computer.

a.    Click Start, and type cmd into the Search box 

b.    Click on cmd and type "msiexec" at the command prompt and press "Enter."

A new window will open. The version of Windows Installer will be displayed at the top of the window, for example, "4.5.6002.18005."

c.    Click "OK" to close the window.

Hope this helps!

Method 1 didn't worked but the download went until the end before going back and forth randomly and giving me the error

Method 2 requires .net framework....I have no .net framework installed on my computer at all (only a few corrupted scattered remainings might stay hidden somewhere in my computer)

Method 3 told me for every packages that it is incompatible to my version of windows (even the vista ones)

But thanks anyway

Hi,

I would suggest you to follow these methods and check.

Meth od 1: Verify that the Windows Installer service is set to Automatic

1. Click Start, type services.msc in the Start Search box, and then press ENTER.

If you are prompted for an administrator password or for confirmation, type the password, or click Continue.

2. In the Services list, double-click Windows Installer.
3. In the Windows Installer Properties dialog box, click Automatic in the Startup type list.
4. Click Start, click Apply, and then click OK.
5. Start the software installation.

If that does not make any difference then;

Method 2: Try to repair .NET components, if it fails completely remove and install them.

Step 1: Run this fixit and see: Fix MSI software update registration corruption issues

Step 2: Repair the .NET Framework

Repair the version of the .NET Framework that did not update.

1. Click Start, type Uninstall in the Search box, and then click Uninstall a program.
2. Double-click Microsoft .NET Framework that is listed.
3. Select Repair .NET Framework 4 Client Profile to its original state, and then click Next.
4. When the repair is complete, click Finish.
5. Click Restart Now to restart your computer.
6. When your computer is restarted, click Start, type Windows Update in the Search box, and then click Windows Update to install the latest Windows updates.

Step 3: Reinstall all the .Net Framework components and check.

To repair the .NET Framework 1.0, 1.1, 2.0, 3.0, 3.5, use the .NET Framework Cleanup Tool to uninstall multiple versions of the .NET Framework, and then reinstall the components.

To do this, follow these steps:

1.    Visit the following blog post:

.NET Framework Cleanup Tool User's Guide

(http://blogs.msdn.com/b/astebner/archive/2008/08/28/8904493.aspx)

2.    Download dotnetfx_cleanup_tool.zip from the following site:

http://blogs.msdn.com/cfs-file.ashx/\_\_key/CommunityServer-Components-PostAttachments/00-08-90-44-93/dotnetfx\_5F00\_cleanup\_5F00\_tool.zip

3.    When you are prompted, click Open, and then click Extract Now.

4.    In the files that you extracted, double-click cleanup_tool.exe.

If you are prompted for an administrator password or for a confirmation, provide the password, and then click Continue.

5. In the Do you want to run the .NET Framework Setup Cleanup Utility? Message, click Yes.

Note This tool may be in English only, but it also works for other language versions of Windows.

6.    Click Yes to accept the license agreement.

7. In the Product to cleanup window, click the drop-down list, select a .NET Framework version that you want to remove, and then click Cleanup Now.

Note The cleanup tool does not let you remove the .NET Framework 2.0 in Windows Vista or later versions of Windows because the .NET Framework is installed as an operating system component.

8.    After the .NET Framework is removed, restart the computer.

9.    Download and install the following components:

.NET Framework 1.1Microsoft .NET Framework Version 1.1 Redistributable Package

(http://www.microsoft.com/downloads/details.aspx?FamilyID=262d25e3-f589-4842-8157-034d1e7cf3a3)

.NET Framework 1.1 Service Pack 1 (SP1)Microsoft .NET Framework 1.1 Service Pack 1

(http://www.microsoft.com/downloads/details.aspx?familyid=A8F5654F-088E-40B2-BBDB-A83353618B38)

.NET Framework 3.5 SP1 (this will also install the .NET Framework 2.0 SP2 and the .NET Framework 3.0 SP2)

Microsoft .NET Framework 3.5 Service Pack 1

(http://www.microsoft.com/downloads/details.aspx?familyid=AB99342F-5D1A-413D-8319-81DA479AB0D7)

10. Restart the computer.
11. Visit Windows Update again, and then check for and install updates.

Method 3: Upgrade your Windows Installer Package to the latest version (Windows Installer Version 4.5).

http://support.microsoft.com/kb/942288/en-us

Hope this helps!