So far I was praising (Portable) VirtualBox for it's performance and portablility, but today I found out one thing that I really hate because it keeps me from doing my job: no way to turn off time synchronization beween host time and virtual machine time.
Confirmed by the forum, while there is a way to do that on Linux machine, there's no way to do that on Windows machine, which totally piss me off because I need an environment that simulate date back in 2008. In fact, that's the whole reason why I do my work in the virtual environment as I don't want to screw up my system time. This is just stupid and bullshit.