Updates

When I log into my dashboard it tells me I need updates! Now I' getting really confused I did place the "update" file where I was told but now my BP group calender is all funky! It still is telling me it needs to be updated and now it's telling me I need to update my magazine theme? How do I do this? This is very confusing and any helpful advice would be greatly appreciated. I don't know exactly what steps I take to update the themes and plugins as I also don't remembers where I place the files! :p Thank you.