Support.cab is included with every service pack. Windiff.exe is also in the Support.cab file. To install the support tools, run Setup.exe from the Support\Tools folder. In Microsoft Windows 2000 and later, Windiff.exe is included on the original CD-ROM in the Support\Tools folder. It can be important to determine this, as file damage can indicate an underlying network or system problem. This solution may solve the problem, but it prevents you from knowing whether the original file was damaged. If a file is suspect, the typical solution is to recopy from a known good file. Therefore, you want to make sure that they are the same. Sometimes you may experience unusual program behavior and may suspect that a file is damaged, or you may suspect that two files have the same byte count but different dates. The file byte count and the creation date are not reliable indications.Īpplies to: Windows Server 2012 R2, Windows 10 - all editions Original KB number: 159214 Summary This article describes how to use the Windiff.exe utility, a tool that graphically compares the contents of two ASCII files, or the contents of two folders that contain ASCII files, to verify whether they are the same.