After getting said laptop from Dad and fixing, couple of things to note.
1. “System Tool” infection is wicked, but fixable: best fix here
2. Try try try to remove access to IE. But you can’t completely. But you can do this. Create an htm file somewhere on the C drive, and edit to say something in size 20 font like “Dad, don’t use IE, use Google Chrome” and link to Google Chrome path on the machine. Set it as the homepage (file://c:blah.htm)