Windows computer consists of many applications, software or programs by dint of which you can complete many technical works very easily. You can also attach some hardware to the computer to make your work easiest. But sometimes it is seen that when you try to open or start an application in the computer, you may get xntutil.dll is missing error in Windows. It may happen mainly when the application is associated with the xntutil.dll file. Main reason for the occurring of this issue is the missing xntutil.dll file. After the occurring of the xntutil.dll was not found error, you will not be able to access any application in the computer. So, it is very important to fix the issue with the help of manual or automatic methods. You can also fix the problem using some manual or automatic methods. You can use the Advanced System Repair tool in the computer for automatic error removal.