Ok, so this is more a note for my future self than anything interesting, but basically, to force Windows to keep the computer’s RTC at UTC (required if dual-booting Linux, and also just in general makes sense), adjust the following registry key:
Key: HKLM\SYSTEM\CurrentControlSet\Control\TimeZoneInformation\RealTimeIsUniversal Type: DWORD Value: 1 (RTC is in UTC) , 0 (RTC is in local time (default)
Alternatively, save the following as a registry key file (.reg), and import it into your registry:
Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\TimeZoneInformation]
"RealTimeIsUniversal"=dword:00000001
