Have you done a restart? If you have not, power the computer down by removing the power (shut off the power strip). This will prevent any settings in appearance from being saved. As a normal shut down saves the location of the task bar, and desktop icons. If when you start the computer back up, and it is still to the side, just click on it and drag the task bar to the bottom. If this doesn't work, take a look at your task manager, there is a resources tab, see if any of the tasks are a program you recognize, one that you could shut down. Don't shut any down that you don't know what it is, many of them are required to run windows.