virtualbox 과거 날짜 셋팅
to run software which has the time restriction of running matlab2009 like.... sync off "C:\Program Files\Oracle\VirtualBox\vboxmanage.exe" setextradata XP "VBoxInternal/Devices/VMMDev/0/Config/GetHostTimeDisabled" "1" sync on again "C:\Program Files\Oracle\VirtualBox\vboxmanage.exe" setextradata XP "VBoxInternal/Devices/VMMDev/0/Config/GetHostTimeDisabled" "0"