Use established tools like 7-Zip or WinRAR .
Use built-in tools like Windows Security or reputable third-party antivirus to block threats automatically.
Upload the file or the URL to VirusTotal to check it against dozens of antivirus engines.
Are you having trouble opening a specific file type inside that folder, or
Malware that locks your files until a fee is paid. 2. Use a Sandbox or Scanner