Use the official WinRAR or the RAR Opener from the Microsoft Store. You can also use WinZip .

Only download files from official educational portals or trusted academic repositories. Avoid third-party "review" sites or suspicious download links that may bundle unwanted software. How to Open a .rar File

Compressed files like .rar or .zip can contain malware or viruses. Any harmful software within the file cannot damage your device until you extract it, so it is vital to scan the file with antivirus software before opening it.