Redshift.exe startup wrappers for Windows

create redshift.bat in the same folder as redshift, edited with location. Note -m wingdi, necessary for Windows (over randr)

redshift.bat contents:
.\redshift.exe -m wingdi -l LAT:LON

create redshift.vbs in the same folder as redshift.bat, this will make it run invisibly.
redshift.vbs contents:
Set WshShell = CreateObject("WScript.Shell") 
WshShell.Run chr(34) & ".\redshift.bat" & Chr(34), 0
Set WshShell = Nothing

create a shortcut to this .vbs file and put it in Startup folder:
%APPDATA%\Microsoft\Windows\Start Menu\Programs\Startup\redshift.vbs - Shortcut.lnk