Each file extension in Windows is associated to a program and when you open the file, its set to open with the default program for that particular extension.每個文件擴展名在Windows是相關的程序，當你打開該文件，它開的默認程序特定的擴展名。 You can set/change the association of each extension with any program manually.您可以設定/變更該協會每延長與任何程式手動。 To do this Open Control Panel and select “Make a file type always open in a specific program” option under Default Programs.要做到這一點打開控制面板，並選擇“製作的文件類型總是打開一個特定的程序”選項根據預設程序。

Here you can see the list of all extensions and the associated programs on the right.在這裡您可以查看所有的擴展和相關程序的權利。

If you need to change or set the default program, select the extension and click Change Program button located on the top right corner.如果您需要更改或設置默認程序中，選擇延長，然後按一下按鈕變更程序位於右上角。

Here the recommended programs and also the other programs are displayed.在這裡，建議的程序，也是其他程序中顯示出來。 Once you select a program, the file will be associated with that program.一旦你選擇一個程序，該文件將與該計劃。 Alternatively if you need to change only for a particular file, right click on the file and select Properties-> General Tab and select the Change button.或者如果你需要改變只對特定的文件，右鍵點擊該文件，並選擇屬性， “一般標籤，並選擇更改按鈕。

Once you are selected the program, click OK.一旦你選定的程序，單擊確定。

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