1Her password is fine. The laptop’s clock is nine minutes slow, and the sign-in system refuses logins from clocks that far off.
2Why it happened: the laptop stopped receiving the company’s time setting on October 14.
3The fix: reset the clock and reapply the setting. Safe to run; takes under a minute.
Sign-in failures · WS-0142 → DC01 · last 24 hours
Event 4771 · Kerberos pre-authentication failed · code 0x25 (clock skew) × 14
Local time offset −9 min 12 s
Time source unreachable since 10/14 09:02
Policy “Time sync” last applied 10/14 · 3 later refreshes failed
Same pattern on 2 other laptops in the Leeds office
Proposed resync time · re-run policy refresh · check Leeds network time route