Well my next question would be to ask if you have done a back up of your system prior to this happening. If not, then that really limits the possible remedies. If you don't have a back up available, check your system restore, as that might also be available, depending on if it was enabled. Then the last thing I would ask, since you say that there seems to be some program that is preventing you from moving the task bar, are you able to use the start button? If you are, then I would say your system might have been hijacked, and you need to run a spybot search program, as well as an anti-virus program.