My 3 year old daughter was using paint brush on my computer, when she was done the computer shut down. The next time it started up it went to the screen where I decide how to start up, ie safe mode or last settings that worked. I choose the last settings that worked and I'm able to use my computer. But when I try to restore to an earlier date it says that no changes where made. How can I find what isn't working? So I can fix it?