Winrar unlock is a software which allows to extract files from password protected archives.
Winrar Unlock was designed to unlock winrar archives (including SFX) allowing you to modify the content freely.
With Winrar archive lock to prevent modification, people cannot change the content in it, cannot change the comment and so on. Through some patching of few bytes, you are able to modify your archive with ease.
just browse the file and then click start
a new filename.bak file will be created
open it with wnrar and it will show you the password then use the password to extract from the file using winrar
no installation is needed.
for zip files there is another freeware
Zip recovery passwords
here is the download link
if any errors please send a PM