I have a client who uses another vendor for their point of sale system. I need to periodically download reports from this system and currently the only way to do so is with Internet Explorer and it uses Silverlight. So I run Windows under VirtualBox, and this works, but after a few minutes, Windows slows to a crawl. It will take literally a full minute for a click or keypress to register.
When I look at the CPU usage, VirtualBox is using more than 200% of the CPU (2.9 GHz Quad-Core i7). Closing the IE window (and waiting a minute for the clicking of the close button to register) returns things to normal.
Is there anything I can do about this?