Unable to Install any .NET frameworks on win7 pro SP1

[edwarde16]

Hi there, I was troubleshooting getting an update installed (KB4535102) and tried the normal routes to to try and fix the .NET framework (.NET Framework repair tool) and ended up just uninstalling them and in an attempt to fix it. This was catastrophic as I can no longer install any .NET framework at all.

I've tried all the installers (both web and offline) and they all result in error 0x80070643.

I've tried the some of the troubleshooting methods mentioned in this thread ([SOLVED] - Can't install any .Net Framework on Windows 7 Pro Sp1) but have had no luck.

Any ideas would be much appreciated as im basically out of options.

 

[Windows Update Bot]

Hi @edwarde16,

Welcome to Sysnative Forums!

If you haven't already, please review the posting instructions here, and attach the requested log files. Without log files, our helpers will not be able to assist, and this will slow down fixing your machine.

If logs have been already been provided, our team of volunteers will analyse the provided log files to build a fix for your system. Please be aware that this may take several days from your initial post, due to the high volume of threads that we receive.


- Sysnative Windows Update Team

 

[PeterJ]

Hello and welcome,

Follow the instructions below to run a scan with the System Update Readiness Tool (SURT) and provide a log.

1. Download SURT for your system. (Windows 7 SP1 x64)
2. Once downloaded, execute the installer, and go through the installation (this process can take around 15-20 minutes).
3. On completion, a log will be created in C:\Windows\Logs\CBS\CheckSUR.log.
4. Attach this log to your next reply.

Alternatively, if these instructions are unclear for you, you can follow the tutorial below.
System Update Readiness Tool (SURT)

 

[edwarde16]

Hi,

Tried following the tutorial but for some reason the checksur executable wasn't initiating the process and was terminating even after running at an elevated level. I downloaded the .msu from the update catalog and just executed that instead and I believe the process worked.

I apologize in advance if I majorly screwed up somewhere along the line, I just wasn't quite sure if I needed to download all files or if I could just run it as is.

Ed

 

[edwarde16]

I went ahead and used the other tools to gather the relevant log information. Hopefully something in here should shed some light.

Thanks again for your help.

Ed

 

[PeterJ]

Follow the instructions below please.

Step 1:
WARNING! The following fix is specific to the user's system in this thread only. No one else should follow these instructions, as it could damage your system.

• Download
  
  SFCFix and move the executable to your desktop.
• Download the attachment SFCFix.zip and save it on your desktop.
• Save any work you have open, and close all programs.
• Drag the SFCFix.zip file over the SFCFix.exe executable and release it.
  
  
• SFCFix will launch, let it complete.
• Once done, a file will appear on your desktop, called SFCFix.txt.
• Open the file, then copy and paste its content in your next reply.

Step 2:
Start the System Update Readiness Tool (SURT) again.
On completion, attach the logfile C:\Windows\Logs\CBS\CheckSUR.log to your next reply.

 

[edwarde16]

Hi,

Very sorry for the delay, had a hectic weekend which bled over into Friday and Monday. Applied SFCFix and had the same issue with the checksur exe file terminating itself. Either way, I ran the .msu and have attached the relevant logs.

Thanks again,

Ed

 

[PeterJ]

No need to be sorry. Just take your time.
Well done. The Checksur log is clean.

Restart the machine.
Run the command sfc /scannow in an elevated commandprompt and report the result.
If it fails, copy the file C:\Windows\Logs\CBS\cbs.log to your desktop.
Zip the copied file and attach the zipped cbs.log to your next reply.

 

[edwarde16]

Hi,

Please find attached.

Ed

 

[PeterJ]

The log is clean.
Check Windows Update but do not install any updates yet.
Provide a screenshot of the available important updates first.

 

[edwarde16]

 

[PeterJ]

Try to install KB915597 only and report the result.

 

[edwarde16]

Hi,

Successful install of the two security updates, still no luck on the .net framework related updates. Same error as before [error code: (0x80070643)].

 

[PeterJ]

Rename the folder C:\Windows\Microsoft.NET\Assembly to C:\Windows\Microsoft.NET\Assembly.old.
Try to install KB4503548 only and report the result.
If it fails, copy the file C:\Windows\Logs\CBS\cbs.log to your desktop.
Zip the copied file and attach the zipped cbs.log to your next reply.