I've tried that. There were four boxes. The monitor one was set to turn off after 20 mins. I've changed that to never. I'll have to wait until my wife plays The Sims again to see if it works, though, probably tomorrow.
Or, you could try uninstalling the Sims, and then re-installing it. If you try this, use Revo un-installer -
During the un-install process you may be asked if you want to re-start your computer, DO NOT re-start at this point, let Revo continue. You will eventually get the option to Select All and to Delete - DO SO. You will be given the same options a second time, again DO SO, do not be picky, just accept all that Revo chooses. After clicking on Finish, re-start your computer.