Problem installing .NET Framework with Windows 7 64-bit.

I recently installed Windows 7 Professional Plus 64 bit version.  At first I experienced no problems.  Now when I boot up, I get the message that "Microsoft.NET Framework Version 2.0 is required to continue".  When I try to install it, I get the message that it is "not supported on a 64-bit operating system".  So I tried Framework 3.5 and when it starts to install, I get the message "Setup Error". 
 

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Last updated July 8, 2019 Views 120,628 Applies to:
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Answer
According to this thread: http://social.msdn.microsoft.com/Forums/en-US/netfxsetup/thread/f983b4e9-ab63-4497-a20a-9acc0df83fd9

For Windows 7, .NET Framework 3.5 with SP1 is shipped with it as one of OS component.
For .NET Framework 3.5 with SP1, it includes .NET 2.0 with SP2 and .NET 3.0 with SP2 as prerequisite.
This means, you have the .NET Framework 2.0 SP2, 3.0 SP2 and 3.5 SP1 plus a few post 3.5 SP1 bug fixes on Windows 7. They are OS components . We don't need to manually install it.

Please use Verification Tool  to verify .Net Framework 2.0. If .Net Framework 2.0 cannot be verified on your computer, you can try to follow the steps mentioned in the following blog to repair the .NET Framework 2.0 on Windows 7.
See: http://blogs.msdn.com/astebner/archive/2007/03/26/how-to-repair-the-net-framework-2-0-and-3-0-on-windows-vista.aspx  (also apply to Windows 7)

Or you can try to repair OS. Here is a KB about this, please see: http://support.microsoft.com/kb/936212/

Since .NET Framework 2.0 is installed as a part of the OS, the cause can be that OS is not well installed on your PC.

You can try the following:
Click Start
Type: CMD, from the results, right click CMD
Click 'Run as Administrator'
At the Command Prompt, type: sfc/scannow

This will check for any integrity violations

Restart your system

also:
1. Insert the Windows 7 DVD
2. Restart your computer
3. When asked if you want to boot from your DVD drive, do so.
4. Choose your language, click Next.
5. Click 'Repair your computer'
6. Select operating system you want repair.
Andre Da Costa http://adacosta.spaces.live.com http://www.activewin.com
Best,
Andre
Windows Insider MVP
MVP-Windows and Devices for IT
twitter/adacosta
groovypost.com

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