Files with the extension DOT contain a document template, ie a template for Microsoft Word documents. These files contain various formatting information, such as margins, the header and footer, and fonts and sizes. They can be used to create multiple documents with the extension doc, all using the same style. This is useful for business letters, etc., for example.
Microsoft supplies with Word some templates, but many templates are also available for free or for sale.
The DOT files are used by the version 97 to 2003 of Microsoft Word. The newer versions as of 2007 use the dotx extension for their template files.
Word uses a file labeled Normal.Dot as a common template. This file has often led to serious problems. If the file is damaged by, for example, file system errors, Word may crash continuously, no longer save documents or show similar fatal errors. Usually it helps to move or delete the Normal.Dot. This file can be hidden by Windows.
Most often resolving problems with opening DOT files is very simple. Just install an appropriate program that supports such files. All of the listed programs support DOT files, but may vary in offered function and purpose. Some programs may be capable only of viewing contents of DOT files or offer file conversion options, but may not be capable of editing such files.
It is possible that although a compatible program has been installed on user’s system, it is not used by the system to open it. This may happen because no default application was associated with this type of files. To associate DOT files with given application, select "Open with" from drop-down menu (accessed by right-clicking on the file). Then select from the list the program or application you want to be used to open this type of file. If the Microsoft Word applications is not on the list, select "Browse" option in order to manually locate the directory where Microsoft Word has been installed.
Sometimes problems with opening DOT files may not lie with the application itself, but can arise due to other causes, such as: