Now KB5015814 won't install

Sorry I couldn't help you.

An easy search on the start bar for "Turn Windows features on or off" will get you to where you can turn off the ".Net Framework 3.5" it comes up as the first option. You just have click on the blue box with the minus sign that is next to the folder that has .NET framework 3.5 after it. When you click on that blue box it will turn white. Then you hit ok and if things go well it should remove (turn off) .NET framework 3.5 and probably make you restart your pc. After your pc comes back on you can just retry the update again. If you weren't able to turn off .Net Framework 3.5, then you have a more serious problem and at this time probably want to leave it alone. Since you seem to be a novice I don't recommend my other option of installing your OS over your OS. Like you said you'll probably have to wait for someone at MS to make the fix easy for you before it will get fixed.

The strangest thing with these 2 failures to install (KB5014668 and KB5015814) is if you read the posts, there are Intel and AMD CPU's involved. Some are running Malwarebytes (and it's uninstall or disabling seems to work) and others are not running Malwarebytes but encountering the failure. Some users disable .NET Framework 3.5 and that works. Some failures 3.5 is not even active. Some are user built PC's, others are store bought complete systems. An in place upgrade works for most but not for all. Somewhere there has to be a common reason for the failure. I don't think that will come out in this forum. MS has been getting numerous feedback reports so they should be aware of the problem. But if it's only affecting a few thousand (million??) that may be a small issue to them??? Well, hang in there. The next big test will be August 9.

And it's my guess, there are a lot of users who have no idea that these updates are not even installing. Those are the ones that know little more than pushing the "on" button. They have no idea what the "settings" button is or where to find. I know an elderly couple near me that only knew to shut down their PC by holding the "on" button. Telling them to look to see if they had an update failure is far beyond their ability. Oh well.....

I'm not really sure a bunch of users are going to figure out what the root cause or fix is for this issue. Listing all the apps and configurations we all have on our PC's might not be feasable here. Turning off an antivirus program and having success might be a factor and is nice to know. Doing an in place upgrade is way above the average user's ability nor should such a drastic procedure be necessary to install an update. And unless a person who has had a failed update reads this forum or finds something else somewhere on the web they would never know to do the update. The real solution will have to come from MS.

Keep the successes and failures coming. It might help someone.

This one is giving me fits as well...Did not have any problems with updates before this one today KB5015814...It installed on some systems...Failed on most systems. Have already tried using the StandAlone installer file...Nope...Still not installing...I'm trying various troubleshooting steps now but so far have not found a successful fix.

Hello Ken. I'm Greg, 10 years awarded Windows MVP, here to help you.

Are these updates bothering you in some way? Windows Updates usually eventually sorts them out, but it has to scan 1.5 billion PC's every few days so it can get behind and may take awhile to sort them out as to priority, or process the telemetrics to adjust the update to avoid failure.. So you can ignore it and not micro-manage updates if they are not bothering you.

There are some fixes others have reported for those Updates here you can try:

https://ugetfix.com/ask/how-to-fix-kb5014668-fa...

https://www.youtube.com/watch?v=LybFiawwcdM

You can also try manually installing them to see if that works:
http://test.catalog.update.microsoft.com/v7/sit...

When you say not to give "canned" replies, do you mean the Updates fixes that work most, collected from tens of thousands of Update cases I''ve handled here, which I've prioritized according to what works most, give out dozens of times every day, and which work more than half the time? Those are only given if it's reported that NO Updates will install or other serious dysfunction. You don't have that situation, correct?

Feel free to ask back any questions. Based on the results you post back I may have other suggestions if necessary.

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