Just for the know: IObit software has been known to be problematic and buggy on some systems and tends to carry some bloatware with it.
For a start button: Classic Shell is one of the top rated free apps out there for windows 8. I personally use Start8 from Stardock. It has a more realistic feel to it then Classic Shell does.
As for the taskbar extender....I've use both Multimon and Display Fusion. Multimon is free to try, Display fusion is free, but there is a paid version for display fusion, which I have.