Hello. My name is***** to JustAnswer. I'm reviewing your question now, and will post back with your reply momentarily.
You can find out what you are on (computer details) by following this guide.
Can you tell me exactly what happened and what 'changed' that you dont want?
Thats okay. Are you with your computer? (sounds like it may have upgraded to windows 10 or another version)?
Can you tell me if you press your windows key (by alt and space bar on your keyboard) and pause break on your keyboard
at the same time, does it say windows 10 or windows 8 (or 8,1)?
That will tell us more