Reasons for “Not Responding” error If any of the following criteria are true, this issue may arise: When the machine is connected to one or more non-existent or presently unavailable mapped network shares. When one or more mapped drives are persistent and the disc is located in an untrusted domain. When the mapped disc is on a machine that is sluggish or low-level. When a computer’s operating system is an earlier version of Microsoft Windows than the computer you’re using, it’s known as a down-level computer. When a mapped disc is shared over a wide area network (WAN). When a detachable drive becomes inaccessible. How to fix it? : Office Program Not Responding Try each of the following remedies in order to fix word not responding error and properly use and save files on your operating system. You don’t have to try them all.