Windows 7 - Important Update for Windows 7 keeps failing

Hello,

Yesterday my laptop had an update for me, so I attempted to install it. However, when it was done I was told that the installation failed. I restarted the computer and attempted to install it again, but it still failed. I looked into more detail on what I was installing, which was Microsoft .NET Framework 4 KB2468871, and went to the site it was based on and attempted to install it from there. When the setup came up however, I recieved this message:

"KB2468871v2 does not apply, or is blocked by another condition on your computer."

I'm not entirely sure what this means, and since this is apparently an important update for my laptop, I ask if there is a way I can solve the problem (also it's getting irritating to have my laptop keep on reminding me to update something that fails to update).

Thank you.

P.S. I don't know if this helps, but my laptop has Norton 360.

Norton may be blocking it, especially seeing this "KB2468871v2 does not apply, or is blocked by another condition on your computer."


Read this KB2468871 System Update Install Error! (error 643) - Microsoft Answers

So I followed the instructions you gave me to install it, and that helped get pass the "KB2468871v2 does not apply, or is blocked by another condition on your computer." message. But after it finished installing, it still said that the installation didn't work. I clicked the installation log and it gave me this:

"OS Version = 6.1.7601, Platform 2, Service Pack 1
OS Description = Windows 7 - x64 Home Premium Edition Service Pack 1
CommandLine = C:\3f26ec0b03ed7f9c578df9e8f281622d\\Setup.exe
TimeZone = Central Standard Time
Initial LCID = 1033
Using Simultaneous Download and Install mechanism
Operation: Installing
Package Name = KB2468871v2
Package Version = 10.0.30319
User Experience Data Collection Policy: AlwaysUploaded
Number of applicable items: 1
Summary Information:

Microsoft .NET Framework 4 Client Profile
Microsoft .NET Framework 4 Extended

Patch (C:\3f26ec0b03ed7f9c578df9e8f281622d\NDP40-KB2468871.msp) Install succeeded on product (Microsoft .NET Framework 4 Client Profile). Msi Log:
Patch (C:\3f26ec0b03ed7f9c578df9e8f281622d\NDP40-KB2468871.msp) Install failed on product (Microsoft .NET Framework 4 Extended). Msi Log:
Final Result: Installation failed with error code: (0x80070643), "Fatal error during installation. " (Elapsed time: 0 00:06:57)."

And I selected "Errors" for Message Types and this was the information that they gave me:

"Summary Information:

Microsoft .NET Framework 4 Client Profile
Microsoft .NET Framework 4 Extended

Action: System Requirement Checks
Action: Disk space check for items being downloaded
Action complete
Action: Enumerating incompatible processes
Action complete
Action: Enumerating incompatible services
Action complete
Action complete
Action: Downloading and/or Verifying Items
C:\3f26ec0b03ed7f9c578df9e8f281622d\NDP40-KB2468871.msp: Verifying signature for NDP40-KB2468871.msp
C:\3f26ec0b03ed7f9c578df9e8f281622d\NDP40-KB2468871.msp Signature verified successfully for NDP40-KB2468871.msp
Action complete
Exists: evaluating
Exists evaluated to false
Action: Performing actions on all Items
Entering Function: BaseMspInstallerT >::PerformAction
Action: Performing Install on MSP: C:\3f26ec0b03ed7f9c578df9e8f281622d\NDP40-KB2468871.msp targetting Product: Microsoft .NET Framework 4 Client Profile
Patch (C:\3f26ec0b03ed7f9c578df9e8f281622d\NDP40-KB2468871.msp) Install succeeded on product (Microsoft .NET Framework 4 Client Profile). Msi Log:
Action
Action: Performing Install on MSP: C:\3f26ec0b03ed7f9c578df9e8f281622d\NDP40-KB2468871.msp targetting Product: Microsoft .NET Framework 4 Extended
Returning IDOK. INSTALLMESSAGE_ERROR [There is a problem with this Windows Installer package. Please refer to the setup log for more information. ]
Patch (C:\3f26ec0b03ed7f9c578df9e8f281622d\NDP40-KB2468871.msp) Install failed on product (Microsoft .NET Framework 4 Extended). Msi Log:
MSI returned 0x643
Entering Function: MspInstallerT >::Rollback

Action Rollback changes
PerformMsiOperation returned 0x643
PerformMsiOperation returned 0x643
OnFailureBehavior for this item is to Rollback.
Action complete
Final Result: Installation failed with error code: (0x80070643), "Fatal error during installation. " (Elapsed time: 0 00:06:57)."

I tried installing it again, this time turning of my Norton's Smart Firewall in case that might work. I still got the same problem.

As stated here, empty ALL temps then proceed Troubleshooting .NET Framework 4 Install failures - VarunGupta - Site Home - MSDN Blogs

Use TFC (Temp File Cleaner) by Old Timer TFC - Temp File Cleaner by OldTimer - Geeks to Go Forums save it to your desktop.
Save any unsaved work. TFC will close ALL open programs including your browser!
Double-click on TFC.exe to run it. If you are using Vista/Windows 7 right-click on the file and choose Run As Administrator.
Click the Start button to begin the cleaning process and let it run uninterrupted to completion.
Important! If TFC prompts you to reboot, please do so immediately. If not prompted, manually reboot the machine anyway to ensure a complete clean.

Oh my God! It worked! It finally worked! I fiddled around with this for HOURS and it finally worked! *dies from joy*

Thank you for your assistance :3

Glad it worked and thanks for reporting back!

This is the exact thing that is happening with my laptop. I've tried installing the update but it keeps saying Installation did not succeed. After that, I don't know what else to do. Please help

Welcome to the forum, please start a new thread with the details of your problem that way you are more likely to get the help you need.

Posting at the end of a thread where the problem has been solved is likely to get you ignored as people have no need to come back so you wont have your problem solved.