This article was written about products for which Microsoft no longer offers support. Therefore, this article is offered "as is" and will no longer be updated.
A file name extension is a set of characters added to the end of a file name that determine which program should open it. By default, Windows Explorer hides file name extensions in Windows 7 and earlier versions of Windows. However, you can make file name extensions visible. This article describes how to show or hide file name extensions in Windows Explorer. The article also provides an automatic solution that can be used in all Windows platform to show file name extensions.
To have us show file name extensions in Windows Explorer for you, go to the "Fix it for me" section. If you prefer to fix this problem yourself, go to the "Let me fix it myself" section.
Fix it for me
To fix this problem automatically, click the Fix itbutton or link. Click Runin the File Download dialog box, and then follow the steps in the Fix it wizard.
If you want to hide file name extensions in Windows Explorer after you run this fix it package, you must follow the steps that are described in this article manually.
This wizard may be in English only. However, the automatic fix also works for other language versions of Windows.
If you are not using the computer that has the problem, save the Fix it solution to a flash drive or a CD and then run it on the computer that has the problem.