Can't see the content of all my files

Hi to all, I have a problem with my windows 7 64bit PC. All started when i was trying to open a document or a photo file and it showed black for images and corrupted content for documents. The size of the file is correct but not the content. I checked for virus with ESSET and clean it. The problem remains. It looks like that the file system is corrupted. I tried sfc command and check disk...