I often keep a virtual machine running for relatively long periods of time, and after a while, the fan on my desktop gets loud (probably because it's using so much energy at the time). After I shut the VM down, the fan quiets down. I've been thinking about upgrading the hardware since its getting up in age anyway, but I don't have the money for it at the moment. Now I'm thinking of shutting each VM down when I'm not using it, such as when I'm sleeping, and possibly using a different program that doesn't require nearly as much energy and resources to run. If you're running somewhat old hardware, do you have this problem with VB as well?