Stop using it. It is possible that winrar is one of those programs that do not shut down when you click the "X" button, but instead minimize themselves to the system tray. If that is the case, look there and stop the program. If that does not help, then some other program must have a lock on the file, and you'll have to find it or reboot.
RAR is a form of compression. WinRAR is used to create compressed archives. They are similar to zip files, but take up less space when compressed than a zip file.
A zip file is a compressed archive and can be created with a variety of compression softwares. A zip file can be accessed and extracted within Windows without external software, but programs such as 7zip, WinZip and WinRAR are generally used to handle these files.
You don't type it at all. Torrent files, as far as I know, cannot be passworded. The files inside a torrent though, can be passworded using programs such as WinRaR. You can download and use WinRar for free, and then you right-click on your folder, click 'add to (foldername).rar' and it will create a .rar folder for you which can then be passworded.
That's not possible, because the password is used to encrypt the data inside the WinRAR archive. The only way to change the password, is to extract the data from the current WinRAR archive and then to create a new WinRar archive with the new password.
.DAT does not refer to any particular file format. It is used by a large number of applications to refer to any type of data. As such, there is no universal way to extract the contents of them. Actually for Winrar you should pay. but b1.org is free of charge and easy-in-use
It only works with WINRAR. WINRAR is an application used to open .RAR files, such as robot arena 2. Most Win7 computers do not come with WINRAR. It is recommended not to download WINRAR as this may result in computer crashes.
On the disk it is not a compressed file... like if i were to send someone a file and it was 40 megabytes, i could compress the folder down to 20 megabytes using winrar, it will compress any file/ folder for you... they are mostly used as zip files or folders.
Editing the file. ReWriteing the file. Modding the file. Many names can be used. But if you are talking about editing the file in a way to make it do things it shouldn't this would be called: Cracking the file. Hacking the file. Exploiting the file.
It is a Windows system file. You can`t do anything.
If a hole has been drilled in a metal sheet, the round file is used in the created hole to remove rough edges.
Minecraft.jar is just the file that has the information used to run the game, it is not the actual game. You must open Minecraft with "minecraft.exe" If you do want to open minecraft.jar though for any reason, such as installing mods, you can do so by downloading a program such as WinRAR, and using it to open the file.
ZIP is a file format commonly used to archive more then one file into one file and compress them. I recommend using WinRAR 3.71 to open files with formats such as: .zip, .rar, etc. It can be downloaded here: http://www.rarlab.com/download.htm. Simply click on the first option if you have a Windows computer.