Installed Ubuntu Mate 16.04 LTS alongside Win 7 Pro last night and both times I have rebooted to Windows 7 the clock has been ~ 5 hours fast. The clock indicates correctly in Ubuntu and I selected the Central Time Zone during the Ubuntu setup. Is there a permanent way to correct this beyond resetting the clock continuously?
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This is because Windows expects the hardware clock to be localtime, and Ubuntu expects it to be UTC.
It's normally better to configure windows to also use UTC.
Check here
On Windows, create a file named utc.reg with the following content:
Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\TimeZoneInformation]
"RealTimeIsUniversal"=dword:00000001
Double-click it and reboot.
