try to recover it with RAR? If not follow this instructions:
then find your archive. Then click on it. And find on the top of the window the
sign with the first-aid box and click. It will start to recover your file. After recovery ends try to extract your
archive again. If it doesn’t want to extract again, I say that you have to
install some special soft for RAR recovery.
You can try Recovery Toolbox
can read here about another way of RAR recovery, but it’s too big for right
here. So I give you the link: http://www.filerepairforum.com/forum/archives/archives-aa/winrar/462-can-t-extract-rar-archive-what-to-do
mu answer was helpful for you. Good luck!