SirLostSpirit wrote:It's also weird because update KB3172605 installed twice.
You're right. I missed the first one because I was only looking for the Update Agent version - which was still same after the first installation (attempt) of KB3172605. Did you reboot the system after the first three KBs were installed?
Could this mean that KB3172605 failed to instal?
According to the log: No, since it would record any errors. But you can check Control Panel Windows Update > View View update history for any errors. The list should contain two, but at least one, line(s) regarding this particular update.