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Sometimes, however, when the patch, or maybe even service pack, is being installed during shutdown or startup, the update installation gets stuck - freezes, locks up, stops, hangs, clocks... Windows Update is taking forever and it's time to fix the problem.
Please let me know if you've had success escaping a hung Windows update installation using a method we don't have included in the troubleshooting above. If updates are stuck installing on or just after Patch Tuesday (the second Tuesday of the month), see our Details on the Latest Patch Tuesday piece for more on these specific patches.
Vista taskbar clock stopped updating comments