Security: "Does Bitdefender Free really work?"

And the answer is: "Yes! - Definitely."

Tom asks "Where's the Start Button?" (See below please!)

For the Start Button, tap or click on the Windows Logo at the extreme left of the Taskbar. When the new window opens, it's right above that Windows Logo in the left-hand column. You can't miss it. Of those first four buttons above the Windows Logo, each of which is one of your main access points for other items, the Power button is the second from the bottom. Tapping or clicking it brings up two choices: "Shut Down" or "Restart". And Tom, this will also answer yours earlier about "Why do I have those Desktop Icons for Restart and Shutdown?"
Because: Those eliminate two steps in the procedure, and get me there quicker.
(Note to Microsoft: Please feel free to copy this idea, no strings attached - it's all yours if you want it!)