Now KB5015814 won't install

I found the problem with my computers and the update KB5015814. Two of my seven computers installed the update without issue.

The other five computers would not install this update. I had thought about disabling MALWAREBYTES to see if that was the issue

but got tied up in other troubleshooting and since MALWAREBYTES is installed on all seven of the computers with the same settings.

(Actually eight...One Win10 machine) and two of the seven Windows 11 machines had installed this update with MALWAREBYTES installed (Latest version on all) I had dismissed it as a possibility (WRONG!!!). In the end it WAS MALWAREBYTES! Version 4.5.10.200. Once I disabled all of MALWAREBYTES services on the MALWAREBYTES UI Panel I was able to install KB5015814 without issue on all the remaining five Windows 11 computers. UGH. Always try the simple thing first....Hope this might help someone else. Regards.

Can Verify, after fighting with this for hours, simply disabling Malwarebytes protection and boot on start options allowed the update to finally take! what a hero!

I found the problem with my computers and the update KB5015814. Two of my seven computers installed the update without issue.

The other five computers would not install this update. I had thought about disabling MALWAREBYTES to see if that was the issue

but got tied up in other troubleshooting and since MALWAREBYTES is installed on all seven of the computers with the same settings.

(Actually eight...One Win10 machine) and two of the seven Windows 11 machines had installed this update with MALWAREBYTES installed (Latest version on all) I had dismissed it as a possibility (WRONG!!!). In the end it WAS MALWAREBYTES! Version 4.5.10.200. Once I disabled all of MALWAREBYTES services on the MALWAREBYTES UI Panel I was able to install KB5015814 without issue on all the remaining five Windows 11 computers. UGH. Always try the simple thing first....Hope this might help someone else. Regards.

You have everything that we now at this moment about those Updates.

I tried the manual update and the in place upgrade with KB5014668. Neither worked. I rolled back the upgrade after it didn't work. I haven't tried anything yet other than Windows Troubleshooter for this update and it didn't work. The problem I have with doing the upgrade is I use Macrium Reflect and doing the upgrade or rolling it back causes all the backups to reset as if it was seeing a new drive and starts their sequences again. I can restore the PC to either June 20 before the patch came out and I already had a successful 2nd Tuesday June update or can restore to June 1. But again, this would be a last resort if MS can't figure out what's happening. I'm not sure restoring either will make a difference until someone figures out what the common thread is for the failures.

That's why I was hoping an Advisor here might know what's happening.

Actually, I did install the June update with no trouble back in June, but this one has got me. Reinstalling the OS in place is the only thing I can think of at the moment, but I'm just going to wait a few days and see what comes out of MS.