Use updated archival tools like 7-Zip or WinRAR to extract the repack files.
While "repack" often refers to pirated software, the process of repackaging can be legitimate for software deployment. If you are a system administrator, you might want to create a repack of a software installer to standardize a deployment across multiple machines. virtual kt so repack
Do you need to speed up decompression times? Use updated archival tools like 7-Zip or WinRAR