I'm trying to open several different files, and I can't do it on my MAC. It is saying that the files are damaged, however, I can open them in other computer, I just can't open in this specific Macbook. I tried opening PDFs, JPGEs, PNGs, Word none of them work. I tried double clicking, tried to right click and click in open, tried open with other softwares, nothing works. When I try to open the same files in other computers, they are just fine. I don't know what to do.
Here's a Screen shot of one example of file that does not open.
ALL FILES show the same message.
Please help me soulve this! Thank you very much