Sometimes, a Windows software hangs, the user interface doesn't respond anymore, and you cannot find out what is cause of the problem. This utility tries to detect the software that is currently hanging, and displays some information that may allow you to understand what exactly caused the software to hang. The information displayed in the report of WhatIsHang, like Call Stack, Stack Data, Processor Registers, and Memory Data, is designed for users with Windows programming knowledge. However, WhatIsHang also displays a list of strings and dll files related to the hang problem, which can also help users without programming knowledge to understand the cause of the problem.