Dk2win32.dll
If you need to revert from a newer v7 driver to an older v6 driver, you must manually delete Dk2win32.dll from the System32 folder after uninstalling the current driver and before installing the older version.
: Many fans use community-made patches like GOG's version or the KeeperFX mod, which often include updated or "wrapped" versions of legacy DLLs to ensure they work on modern hardware. Dk2win32.dll