Why does the Unarc.dll error pop up when installing a repack of any game?

Question

Do it yourself

The archive is complete! there are no losses! demolished antivirus! the archiver reinstalled Windows reinstalled pancake iron already everything practically changed disks only the old ones remained! If you install the game from steam or origin everything is fine! Any repack and immediately the error unarc.dll help for half a year I have been suffering for half a year, nothing helps, I tried everything that can be googled (((((

Answer 1

1) Where is the text of the error?
2) Install the latest version of 7-zip
3) Make sure that there are no Russian characters in the installation path and the installer