I had similar situation with himself rar files,and me helped this tool-
file is corrupt rar,I found it in google,as how as I remember it is free,program has many possibilities,also application solve problems with encountered CRC errors and other failures, when opening sfx and RAR archives, you have come to the right place and we know, how to help,compatible with the PC platform and all supported versions of Microsoft Windows operating system,can be installed on any PC, despite its CPU speed, the efficiency of saving corrupt RAR files will be always the same,moves to the analysis and start the parsing of selected files with RAR or sfx extension,automatically moves to the next step and permits previewing the files, that are stored in the corrupted archive as well as their recovery prognosis,can estimate the results and see, which files can be restored without errors and which ones cannot be extracted.