When you say "Task Side Bar" do you mean the task bar with the Start Button ?
the only time i have seen task bars on the side of the pc screen is if they have been dragged there or if a windows customizing program has added one.
You said files and folders are missing...perhaps the explorer crashed ?
Press CTRL+ALT+DEL, Click the Applications Tab and Press File > New Task(Run...)
Type explorer.exe and press ok.
Hope this helps.