ArcGIS Pro 3.4 Patch 3 (3.4.3) is now available

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The ArcGIS Pro 3.4.3 patch is available to download from My Esri as well as through the software update in Pro (if enabled).

To get the latest fixes, please install this patch. For a list of issues addressed you can review the Release Notes for ArcGIS Pro 3.4.

Important: ArcGIS Pro 3.4 Patch 1 (3.4.1) must be installed before subsequent patches can be installed. Here is additional information about Minor Releases and Patches.

BuffaloCoWI

I've tried upgrading a couple times now, and it fails both from within ArcGIS Pro, or by downloading the patch from My Esri. Here is the screenshot after trying to install from the prompt within ArcGIS Pro:

I did check the box and open the log file. Here are the last several lines:

09:03:02: ArcGISUpdate.exe process exited.
09:03:01: ERROR Upgrade failed on: ArcGIS Pro
09:03:01: Upgrade operation canceled.
09:03:01: ERROR MSIInstallProduct failed: error code = 1603
09:02:18: Attempting to upgrade product: ArcGIS Pro
09:02:18: Killing satellite process.
09:02:18: Killing satellite process.
09:02:18: Killing satellite process.
09:01:58: Wating for ArcGISPro process to exit...
09:01:58: Found process to terminate.
09:01:58: Found process to terminate.
09:01:58: Found process to terminate.
09:01:58: Searching for running processes within the update folder.
09:01:58: Existing installation detected.
09:01:58: Partial download detected, attempting to resume.
09:01:58: Attempting to open connection to: https://esrisoftware.esri.com/akdlm/software/arcgispro/current/ArcGIS_Pro_343_192915.msp?downloadID=... [query string removed]
09:01:58: Received REST redirection response.
09:01:58: Download started...

Here is a screenshot of the even less helpful message trying to install the patch downloaded from My Esri:

I don't know where the Microsoft installer log files are located; it doesn't offer to show it.

BuffaloCoWI

I tried again after a few days and it worked this time.