Method 1: Perform Clean Boot. Boot the computer in clean boot state and check the issue. Placing your system in Clean Boot state helps in identifying if any third party applications or startup items are causing the issue. You need to follow the steps from the article mentioned below to perform a Clean Boot How to perform a clean boot in Windows Note:Refer "How to reset the computer to start normally after clean boot troubleshooting" to reset the computer tostart as normal after troubleshooting. If the issue still persists, follow the method 2. Method 2: Re-register the ISDone.dll file and check if it fixes the issue. PressWindows + Xkey on the keyboard. SelectControlpanel(administrator). Type the following commandsregsvr32 Isdone.dll. PressEnter key. Method 2: System File Checker scan. System File Checker is a utility in Windows that allows users to scan for corruptions in Windows system files and restore corrupted files. This article describes how to run the System File Checker tool (SFC.exe) to scan your system files and to repair missing or corrupted system files in Windows. Use the System File Checker tool to repair missing or corrupted system files http://support.microsoft.com/kb/929833 What Is Isdone.dll/Unarc.dll The Isdone.dll/unarc.dll is a dynamic link library file, which means that it has a specific function which the computer uses in order to complete various tasks. Your computer needs Dynamic Link Library files in order to complete everyday tasks, and they belong in a virtual database called ‘The Registry’. This particular DLL file is used by your computer when playing games, the file then give your computer information on what to do when your computer is playing that game. How to Fix Isdone.dll/Unarc.dll Returned an Error Code: -1/5/6/7/11/12/14 (9 Methods). Searches related to unarc.dll returned an error code -11 unarc error code -11 unarc.dll returned an error code 6 unarc.dll error code -11 fix unarc dll returned an error code fix isdone.dll error unarc.dll error-11 unarc.dll returned an error code 7 unarc.dll error code 7 download unarc dll error code 14 download