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Windows 7: Unable to Update/Repair/Remove .Net Framework 4.5 Error Code 66A

27 Jul 2013   #1
snowboi

Windows 7 Home Premium 64bit
 
 
Unable to Update/Repair/Remove .Net Framework 4.5 Error Code 66A

hi, i am having an issue with updating the .Net Framework 4.5 from Windows Update. It gets an error code "Code 66A". So i decided to use the Setup file to repair or remove it from my computer and then reinstall again but then there are errors too. "fatel error during installation". ive installed SURT and also did the sfc scan but was still unable to update. The update file number is KB2833957. I've attached all the logs and files i think that can help.


My System SpecsSystem Spec
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28 Jul 2013   #2
NoelDP

Microsoft Community Contributor Award Recipient

Win 7 x64 Home Premium (and x86 VirtualBox VM)/Win10
 
 

The CBS.log is incomplete - please reboot, and post a new copy
My System SpecsSystem Spec
28 Jul 2013   #3
snowboi

Windows 7 Home Premium 64bit
 
 

alright. i have rebooted and attached the CBS.log again.
My System SpecsSystem Spec
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28 Jul 2013   #4
NoelDP

Microsoft Community Contributor Award Recipient

Win 7 x64 Home Premium (and x86 VirtualBox VM)/Win10
 
 

CBS.log and CheckSUR.log files are clear of errors.
I suggest downloading and running the .NET cleanup tool from .NET Framework Cleanup Tool User's Guide - Aaron Stebner's WebLog - Site Home - MSDN Blogs and then reinstalling .NET 4.5
My System SpecsSystem Spec
28 Jul 2013   #5
snowboi

Windows 7 Home Premium 64bit
 
 

i used the programme to remove the .net framework and reinstalled but then my computer auto shut down before the installation is complete. and then after i start to get blue screens.
My System SpecsSystem Spec
28 Jul 2013   #6
NoelDP

Microsoft Community Contributor Award Recipient

Win 7 x64 Home Premium (and x86 VirtualBox VM)/Win10
 
 

Sounds like you may have other problems

Boot to Safe Mode, and see if that's stable - if it is, try using a Clean Boot to get into Normal Mode....
How to perform a clean boot to troubleshoot a problem in Windows 8, Windows 7, or Windows Vista
My System SpecsSystem Spec
28 Jul 2013   #7
snowboi

Windows 7 Home Premium 64bit
 
 

Ive successfully installed .net framwork but then i have a new problem, i cant update from windows update any .et framwork related updates. it either gives me a bluescreen or an error code 80072f78.
My System SpecsSystem Spec
28 Jul 2013   #8
NoelDP

Microsoft Community Contributor Award Recipient

Win 7 x64 Home Premium (and x86 VirtualBox VM)/Win10
 
 

Try this....

This could be due to corruption in the SoftwareDistribution folder - the problem with that the conventional cure can lead to problems later on, if not handled properly, and you will lose your Update history (but the updates will still be installed, and viewable in the Installed Updates listing).

Open an Elevated Command Prompt
Run the following commands

NET STOP WUAUSERV
REN C:\WINDOWS\SoftwareDistribution SDOLD
NET START WUAUSERV

wait 15 minutes, and reboot
then wait 10 minutes, and open Windows Updates, and run a Check for Updates.

Install only the oldest update found - and reboot once installed
then go back to Windows updates and install the others.
My System SpecsSystem Spec
28 Jul 2013   #9
snowboi

Windows 7 Home Premium 64bit
 
 

its still not working. it downloaded the update, but cant install it. still the same, auto shut down and blue screen.
My System SpecsSystem Spec
28 Jul 2013   #10
NoelDP

Microsoft Community Contributor Award Recipient

Win 7 x64 Home Premium (and x86 VirtualBox VM)/Win10
 
 

Please open Event Viewer
In the left pane, navigate to the Windows Logs
right-click on Applications and select 'Save all events as...' save as Apps.evtx
repeat for the System logs - save as Sys.evtx
Compress both files, and attach to your reply.
My System SpecsSystem Spec
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 Unable to Update/Repair/Remove .Net Framework 4.5 Error Code 66A




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