You have only installed Microstudio on you computer with MTU CPU Name "pc". You can install it on a second computer without needing MTU.
Enjoy! 
BTW:
It DOES sound like your Granddaughter has visited a web site that has infected your computer with Lord only knows what... viruses, Trojans, Worms. Be sure you don't have any valuable data (such as home accounting, or stock or bank accounts) that you access over the Internet on that computer. If your "pc" now has a Trojan, it IS sending your keystrokes, passwords, etc. to (probably) a Russian web server. If that happens, it is sold worldwide in minutes!
Don't want to scare you, but a similar thing happened to my wife's computer when her son visited a Kazzz site. I found 29 nasties on her computer after his visit!
