Why can't I post pictures??

Hey Hey Hey
I'm not happy at all right now. Today I was going to post my first make up review. Finally something interesting!! So I put the pictures on the computer, I cropped them and saved them as new photos. Then I write my review on here. Then I try to add the pictures. And the little box told me there was an error uploading. It told me that my pictures are either corrupt, or in a unrecognized format. I tried every format it told me I could use. I don't know what it means by corrupt. I've tried different picutres too. The computer I use is old, and doesn't have flash or firefox or other new good stuff. So maybe it's the computer? Or my pictures from my stupid camera? Maybe the browser? Maybe I'm doing something wrong? Or the site is doing something wrong? I do not know. I am angry that it's not working.
So hopefully I figure out how to post pictures, or find another way to post them. So that I can finally post interesting stuff!!