The installer is in a folder with non-English (Cyrillic/special) characters or a path that is too long.
Large game repacks often run out of RAM during extraction. Increasing your virtual memory allows your storage drive to act as extra RAM. You can find steps for this in the Windows Advanced System Settings . Isarcextract.dll Download 64 Bit
Reinstall or repair the affected application The installer is in a folder with non-English
: Many sites offering free DLL downloads host outdated or malicious files. Isarcextract.dll Download 64 Bit
If you have a trusted backup or a second PC with the same software installed: