>>>maybe she means she has hidden the taskbar somehow?
Well, just in case that's what's meant, I'll offer a solution to the problem:
When a Task Bar 'disappears' it usually means that its height has inadvertently been shrunk down to zero. The solution is to place your cursor at the very foot of your screen. It should then change to a double-headed arrow, telling you that it's resting on the top of the Task Bar. You can then simply click-&-drag to pull it up to its normal position. (To prevent it happening again, right-click on the Task Bar and select 'Lock Task Bar').