I'm trying to update the software on my Mom's iMac (I trusted that she could do this on her own. She said she clicks, "Not now" every time. She's had this computer just about a year. Lots to update.) Every time I try to update her software, it prompts me to restart, I click restart, the screen acts like that's what it's doing, and then it goes to her login screen. If I login, it's just a regular login. If I choose to restart from that menu, it restarts like normal. The software never updates. I never get the grey screen with the progress bar. I don't know what's going on. I've never had this problem. Help? Please?