I had a similar problem before. If we're talking about the same virus, I fixed bypassed it by just typing the drive's path in the address bar, or right-clicking and choosing explore. But by the looks of it you're talking about something else.
But now I have another problem, my new USB stick/mp3 player has this new system wherein in creates a new drive space in MyComputer, and I can't use the method earlier to fix this because I don't know the name of the path. Has anyone experienced this?