I have tor browser bundle portable on a usb stick. When I plug it in, and run tor, it works fine. However, I copied the files to a folder on the computer itself. When I run tor from there, it does not work. When I run it, it appears to do something, but then nothing happens. If I try to run it again, a dialog box saying that it is already running appears. I'm using windows 7. Do I have to run the portable version off a USB? If I don't want to have to plug in a USB, do I have to install tor on the machine, instead of just running the portable files?