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SYS-C0151 · Group Policy & Windows Security

UAC Explained

Read one UAC level from 0 to 4. Do not set Never notify to make a check pass.

Updated 25 October 2026 · Explainer

This is an original planning guide. It is not a vendor manual, an official standard, or legal advice. Example addresses use documentation ranges. Review every command before you paste it.

What this hour is for

The explainer maps a level you type. 0 is Never notify, and an admin console stays elevated. 1 and 3 notify without dimming. 2 and 4 dim the desktop. 2 notifies for an app that changes the computer. 4 always notifies. The page does not write the registry.

Do not set level 0 to make a prompt go away. One computer you administer. Do not change the setting during the reading.

192.0.2.10/24 and example.com are documentation. They stay in the note.

The change you can finish

Apply nothing while you are writing the note. When the lab window opens, it is one change on the host named in the ticket. Read the draft, then the host, then decide.

Rollback is the file, the package version, or the snapshot you saved first. You do not invent a rollback after the only copy is gone.

  1. Type a level from 0 to 4.
  2. Read what it does.
  3. Refuse 0 unless the ticket says why.
  4. Do not change the setting.
  5. Stop.

Mistakes that outlive the command

UAC Explained goes wrong in a small set of ways. The list is here so the ticket can forbid them before the window.

Decisions to write down

One decision for UAC Explained: The level is named. Level 0 is absent or explained. Nothing was changed. And the computer is yours.

Checks before you call it done

Confirm this before you call the change done: The level is written. The meaning is written. Level 0 is absent or explained. Nothing was changed. And the computer is yours. If one of those fails, stop.

# Levels 0 through 4.
# 0 is Never notify.
# Do not change UAC during the reading.

Before you leave the host

UAC Explained ends when the hostname in the prompt matches the hostname in the ticket. If it does not, you are on the wrong host. Stop. A command that succeeded on the wrong host is not progress.

The draft stays a draft until a person has read the names in it. A generator does not log into the host and does not know which disk is empty. You delete a line that names a host, a path, or an account you did not write down.

192.0.2.10/24, gateway 192.0.2.1, 198.51.100.0/24, 203.0.113.0/24, and 2001:db8::/32 are documentation. example.com is a documentation name. They belong in the note. They are not values you leave on a host because a draft included them.

prompt-for-this is a reminder that a secret is missing. It is not a password, a key, or a token you save in the ticket or in git. The real secret stays in the password store.

One change is the window. If two things move and the result is wrong, you will not know which one did it. The next change waits for its own page.

If the same step fails twice, stop for the day. The failure is the result. Adding a forum command beside a half-applied change produces a host nobody can rebuild. Restore the copy you took first.

A second person reads the hostname and the change aloud. If they cannot find them in the ticket, the note is not done. Silence is not agreement. Then leave the host alone.

This page is a planning guide. It is not a vendor manual, not an official standard, and not permission to touch a host you do not administer. You do not disable a firewall, AppArmor, or SELinux to make a check pass.

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