Need help with winrar files

every time i try and extract a hack it comes up with a diognostics and says file unknown or damaged. i downloded winrar again but still the same problem. and ideas on how to fix it?

There could be numerous reasons, and I'm almost definate that it's not the WinRar itself.
It could be that the hack was not fully downloaded, this could be because of an internet problem or the download itself could be damaged.
Another reason could be if the file needs the password and you're clicking OK or Cancel which automatically disregards the file.

I can only recommend downloading the file again, as the only understandable reason is the incomplete download or corrupt file.

It happens to me ALL THE TIME :c

Re-Downloading the file doesn't seem to help for me either, the problem just...goes away on it's own after a while ;(

Its because the antivirus is blocking the extract, it happens to me all the time my antivirus doesnt say anithing and the extract fails. Try to disable you antivirus while you extract, it will work

very true.
Try that .. also
and i would suggest if doesnt work.. try and run a CCleaner and Advance system care .. might help..