In the unlikely event that anyone is this deep, looking for meaningful advice, I offer it here. I could address parent's other foaming-at-the-mouth rants, but I'd just be repeating other explosive and rude comments I've already made on this article.
"4) Dump the System Restore from time to time. This is just junk removal. It has its place and can be of great help. But if you have not installed any new in say the last month, disable it, to clear out the trash, and reable it."
No. Do not "dump" it ever. Follow the Control Panel into "System and Security" and then "System". Click on the "System Protection" link from the left-hand pane. You will notice a setting for each fixed disk for System Restore. On the disk that's so hurting for free (i.e. wasted) space, click it then click "Configure".
Here you can choose how much disk space it consumes and you can then completely forget about System Restore until it saves your bacon. You will be glad that you let Windows decide when to delete Restore Points because I can assure you: it knows better than you do.