slmgr commands that fix most activation problems

Windows has a built-in licensing diagnosis tool. These are the commands worth knowing.

The standard recovery sequence

When a previous activation attempt or system tweak leaves Windows in a strange state, run /upk, then /cpky, then /rearm, and reboot. Activate fresh afterwards instead of stacking keys on top of each other.

Run everything from an elevated command prompt; otherwise slmgr fails silently and you assume the command does nothing.

Typical scenarios and the command that solves them

• Old company KMS configured — inspect with /dlv, clear the key using /upk and /cpky, then activate again.
• Unknown if activation is permanent — run /xpr; it answers without changing anything.
• Trial ended unexpectedly — /rearm resets the grace period but is not a licence. Activate properly afterwards.
• Edition mismatch — slmgr cannot turn Home into Pro. Check the channel first instead of repeating rearm attempts.

Pair it with Office diagnostics

Office has its own script, OSPP.VBS, in the Office16 folder. Windows slmgr errors and Office licensing errors look similar but come from different stores; check the right one. A Word unlicensed banner is not solved by reactivating Windows, and the reverse is also true.

Safe order of operations

1. Read the current state with /dlv and save the output.
2. Only then remove keys or rearm, since that information disappears.
3. Reboot where required.
4. Activate once and verify again after another restart.

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