Description of problem: "Critical Operating System Update" is not working. 1. "CHECK FOR UPDATES"-- keeps on checking even if the system is up to date and never says system is up to date.
2. "INSTALL NOW"--If there are OS updates, It will downloads but never installs.
Critical Operating System Update is not working though its set to automatic updates.
WAF will automatically check for updates (but not install, only check) every hour as per settings, even if the scheduled auto update is not enabled. This is why you see the update log shows the 'checking for updates' message every hour (but again, it will not install them automatically).
If you manually click on 'Install Now' button, the update log should at least show 'Installing updates:' in the message. Here is a working case example: