Fixing Windows clock time issue when booting.

I’ve been putting up with a slight annoyance when I dual-boot back into Windows from Ubuntu: The clock in Windows is always offset by a few hours.

The fix:

Set a registry key:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\TimeZoneInformation\RealTimeIsUniversal to 1

This tells the Windows instance to assume the time in UTC when booting up so the time is always correct.

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