put the mouse pointer over the time display, then press the right hand button on the mouse, it should then bring up a display,
at the bottom of this display should be properties, you need then to left click on "properties",
this should then bring up another display, make sure that there is a tick in the box next to "Keep the taskbar on top of other windows". If it doesn't then you need to left click in the box. Then click Apply.
The clock is kept in the taskbar.
Sorry if iv'e gone over the top with the explanation.