Can't install .net framework 3.5 (KB951847) x86

I've been trying multiple times to install this microsoft .net framework 3.5
Service Pack 1 and .net framework 3.5 family update (KB951847) x86 and keep
getting error code 26 and none of the suggestions windows help center is
providing me is solving the problem. I've already fixed a number of problems
running on this laptop (Dell Inspiron 1501) but this one last update will not
install (downloads but will not install). Any suggestions??
(I've already run full anti-virus scans, spybot, registry cleaner, system
diagnositcs, defrag'd hard drive, etc....)

What versions of .Net Framework do you currently
have installed on your PC ?
(What does Add/Remove Programs show)

1. 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.

what do u do 2 fix

Start Windows Update in safe mode
1.To start Windows in safe mode, click the Start button, type msconfig in the Search box, and then, in the list of results, click msconfig.exe. If you are prompted for an administrator password or confirmation, type the password or provide confirmation.

2.In the System Configuration dialog box, click the Boot tab.

3.Click the Safe boot check box, click Network, and then click OK.

4.In the System Configuration dialog, click Restart. This will restart your computer in a special way called safe mode with Internet access.

5.Click to open Windows Update.

6.In the left pane, click Check for updates, and then wait while Windows looks for the latest updates for your computer.

7.If any updates are found, click Install updates. If you are prompted for an administrator password or confirmation, type the password or provide confirmation.

8.Once updates are installed, restart your computer, click the Start button, type msconfig in the Search box, and then, in the list of results, click msconfig.exe. If you are prompted for an administrator password or confirmation, type the password or provide confirmation.

9.In the System Configuration dialog box, click the General tab, click Normal startup, click OK, and then click Restart,

10. Start Windows Update with a clean restart of Windows
Click the Start button, type "msconfig" in the Search box, and then click msconfig.exe. If you are prompted for an administrator password or confirmation, type the password or provide confirmation.

11.On the General tab, click Selective startup, and then clear the Load startup items check box.

12.Click Services, click Hide all Microsoft services, and then click Disable all.

13.Click OK, and then click Restart.

14Click to open Windows Update.

15.In the left pane, click Check for updates, and then wait while Windows looks for the latest updates for your computer.

16.If any updates are found, click Install updates. If you are prompted for an administrator password or confirmation, type the password or provide confirmation.

17.Once updates are installed, restart your computer. Click the Start button, type msconfig in the Search box, and then click msconfig.exe. If you are prompted for an administrator password or confirmation, type the password or provide confirmation.

18.On the General tab, click Normal startup, click OK, and then click Restart.

If the problem persists after you have followed the steps above, go to the Knowledge base article on Windows Update error 80070020 on the Microsoft website for additional steps you can try, or go to the Windows Update Support Center website to request

Had the same problem, but got it fixed.. simple fix, . Download and run the cleanup tool, than reinstall netframework..

Why not get the tool from it's original URL ?

..NET Framework Cleanup Tool User's Guide

Ok try this.
c drive/windows/system32
remove Wmphoto.dll

retry install and it should work...

:D

In January of 2012 I did a reinstall of WinXP Pro SP2
from CD and updated to SP3, IE8 and all of the security
updates suggested by the Windows UPDATE site.
It's very laborious rebooting over and over as
directed but everything worked just fine until I got to
KB951847 .NET 3.5 SP1 and .NET Framework 3.5
Family Update for .NET v 2.0 through 3.5 and a
raft of other Framework UPDATES pushed after
that were failing.
They would download without any bad sectors yet
would FAIL to install, reported by an X on a red circle.
Retries and clicking on the warning x's to get the error codes
gave me errors 0x80070663, 0x633 and 0x8007064c.
I studied various cures described online including both
small MS Fixit and larger MS Fixit program that installs.
The larger one had whole major sections which would
not even run and could NOT report that failure to MS.
I noticed that various people had reported similar
Framework update failures even going back several
years and in many cases there was no report back
about what actually resolved them.
The cure that finally worked for me was described here:

http://answers.microsoft.com/en-us/w...1-232642579e69

Get a redistributable update to Microsoft Installer 4.5!

Checking the version of windows installer
---------------------------------------------------------

http://msmvps.com/blogs/athif/archiv.../03/99125.aspx

<html>
<head>
<script language="vbscript">
sub document_onclick()
set installer = createobject("windowsinstaller.installer")
msgbox installer.version
end sub
</script>
</head>
<body>
Click me for Windows Installer version...
</body>
</html>

Cut and paste that text into notepad, save it as a text file,
rename .txt to .html and double click to run it.
When you run it approve activex access and click the text.
The version of installer (internal code) will be revealed.
Some other methods to investigate what VERSION
you have actually report the number of a
related module but not the Windows Installer itself.
(formerly MSI, formerly MSinstall)
This short html (with approvals from operator)
apparently give a more accurate answer as to
the version of Windows Installer as it is called now.
I found that despite SP3 and ALL of the updates
the update site had pushed out to me that it had
never pushed Windows Installer 4.5 out to me.
I had 3.1.4001.5512 before the KB942288-V3-x86
redistributable installed 4.5.6001.22159 on my machine.
That's a huge jump in software revisions!
Yes, Microsoft's update site had pushed out updates
that required a newer version of INSTALLER before
pushing out the newer INSTALLER to do the job!

Note to Windows UPDATE site managers!

After I installed Windows Installer 4.5 KB942288
in the right flavor for my machine I was right
back to getting updates pushed out by the
Windows UPDATE site and rebooting and
going back to the site as directed and without
0x633, 0x80070663 or 0x8007064c error codes.

Windows Installer 4.5 had solved the update failure problem.

Installer (MSI) 4.5 for various systems
http://support.microsoft.com/kb/942288
http://www.microsoft.com/download/en...s.aspx?id=8483
http://go.microsoft.com/fwlink/?LinkId=120486

Thank you to Gokul T at Microsoft!
Your 2009 pointer solved my problem in 2012.
Thanks!
Greg S. Hanson
Cedar Rapids, Iowa