The process of doing this is as follows winrar repair
Another might more powerful, but more effective way
Right click on the RAR files and from the list, click on the extract files option.
A window will appear showing where a folder can be selected and where it may be saved.
Choose the check box which gives the option ‘Open Broken file’.
Click OK at the bottom of the window.
A warning will pop up but it should be disregarded at this point.
crwdns2934105:0crwdne2934105:0
crwdns2934113:0crwdne2934113:0
crwdns2915270:0crwdne2915270:0
crwdns2889612:0crwdne2889612:0
0