I tried! Honest I did, clicked on it and watched the replacement egg-timer. W7 has a little green circle by the cursor, that goes round and round while you wait.
Round and round and round it went. Round and round...Zzzzzzzzzzzz. Later I awoke to find that it was still going round...and I'd been mesmerized for six hours.
Going to save a fortune on Zolpiem.