I want to extract the devkit for ruby. Its a 7zip archive but one file "mv.exe" is not being extracted and it wont run as well even if I rename it in the archive,extract and rename it back to "mv.exe".
Is it my Mcafee security/antivirus or some other OS config?.
It worked on my home pc but the office pc is giving me this problem.
It's probably a false positive. You can add an exception in this case if the antivirus has this option. If not, you can disable the antivirus while extracting and afterwards re-enable it.