Macbook does not save any documents or download files

This was the most help I have ever received. I did both of the above and when I created the new admin user and opened a document I was finally able to save without problem. I cant thank you enough for your assistance. I will now see if there is an easy way to move my information from the old/corrupt admin to the new admin. FYI I downloaded the etrecheck program that i had never heard about before and it developed a pretty detailed support per below. It seemed like the only major issue was the slow CPU but not going to lie and say that I actually know how to read this. Again, you have really helped me out and cant thank you enough.

Many thanks for the kind response. I get that box but when I go to save on the hard drive or documents i just get the spinning wheel and cant save. The problem is not just the office suite. I cant save for Adobe, Quicken or any program. The interesting thing is when I create and use a new user everything works just not on the main admin side of the computer. Many thanks again for your response. Very kind!