You have downloaded a new version of the game or application, and do not know what's going on, because after you run instead of the long-awaited virtual world, a dialog box, which clearly written warning that it is not enough to complete the work of the system library file.
This means only one thing, that either you do not at all on your computer, or a version of the old, and needs to be replaced. In order to accomplish this, it is necessary to access resources online and unark dll download, causing a reliable source.
How to download free unarc.dll?
Locate the file in the search and by following links, save it on your hard disk, then open the System folder and copy it to the required directory. To complete the process you must reboot the system.