There's your problem. Dump it. Go to Windows 7. Use Office Professional in it's latest disguise. Go to Firefox. Set up automatic scan and update.
In regard to the children using the computer, go to strict "Tiger Mom" guidelines. Immediately replace any child not behaving properly or attaining at least a "B+" average in science and math and 90th percentile test scores with a likely looking orphan. Wait until all chores are properly done, but make replacement announcement BEFORE dinner.
I hope this was helpful.
LOL!