Windows does not natively support RAR files, so you can't extract their contents on your hard drive without using other software. Use WinRAR, WinZIP or 7-Zip to extract the contents of the archive. The utilities can also create RAR, ZIP and 7Z archives if you need to archive your files.
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Download and Install the Software
Download WinRAR, WinZIP or 7-Zip for your version of Windows. You can evaluate WinRAR and WinZIP for free; 7-Zip is open-source software.
Double-click the installer and install the WinRAR, WinZIP or 7-Zip utility by following the instructions.
Extract the Contents of the Archive
Any of the three tools can extract RAR archives. Furthermore, WinRAR, WinZIP and 7-Zip can open protected RAR files if you know the correct password.
Launch the program in Windows 8.1 by pressing Windows-S to display the Search charm, typing WinRAR, WinZip or 7-Zip into the Search field and then clicking the utility in the list of results.
Press Ctrl-O to display the Open dialog in WinRAR or WinZip and then open the RAR file. In the 7-Zip File Manager app, select the folder that contains the archive and then double-click it to view its contents.
Click Extract To in WinRAR or Unzip To (in the Action pane) in WinZip and select the destination folder. In 7-Zip, click the Extract button and select a folder.
Click OK or Unzip to extract the contents of the archive on the hard drive.