The file or directory is corrupted and unreadable

That's not a good sign. You can open a command prompt (as administrator) and type:

chkdsk x: /f

replacing x with your drive letter. It will attempt to fix the file structure. You may still lose parts or all of those files depending on how bad the corruption is.

Thanks! I will try this out. How do I run the command prompt while it cannot boot from the disk? Do I use a different harddisk and run the command prompt while the corrupted disk is connected?

You didn't mention that this was your boot disk and considering that C drive is normally your boot drive and not F, I didn't realize you couldn't boot your computer.

In this case, you can try the ultimate boot cd.

http://www.ultimatebootcd.com/

You can run testdisk off of it and hopefully fix your problem.