The best way to open a 3GP file is to double click on the file and to let the computer decide what program to use to open it. If your computer cannot open the file, then you will need to download a program that can open this kind of file.
When the user of a computer is trying to open a drive and the computer responds with an "Open With" request it is asking what Software program created the file. Some files can only be opened using the original program that created them. A person can choose which program to use when opening the file or let the computer look for the program.
In order to open a DJVU file, you will need to double click on the files icon. From there, your computer will locate a program that can open this type of file.
A .ctg file extension is a computer configuration file. You would need a special type of program or software to open or convert this type of file. To open a .cfg extension file, use a program called Free File Viewer.
If you try to open a file created with a program not installed on your computer, you may encounter an error stating that the file format is not supported. The file may not open properly or may show as corrupted. To open the file successfully, you'll need to install the program used to create it or use a compatible program that supports the file format.
The file extension is the two, three, or more letter code that is after the period in a computer file name. It is used to "tell" the computer what type of file it is and what program on your computer will "open" or "run" it.
you need the program "reliasoft ALTA" or somthing similar.
It means that your computer does not recognize the file type and therefor cannot auto assign a program to open it. Depending on what you download, the "open with" option will allow you to assign the appropriate program for the file.
There are several possible reasons, but the most common is that the computer operating system doesn't recognise the file is an executable program.
Right click on the file and select "open with" and then "choose program"
Extension names allow your computer to recognize which program is needed to open the file.
opening an email attachment downloading stuff from the internet