Before opening the .rar or .exe , upload it to VirusTotal.com . If more than 3/70 antivirus engines flag it as malware, delete it instantly. Look for detections like "Trojan.Packed" or "Malware.Generic."
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Many cracks require you to disable Real-time protection. This is how ransomware gets in. Instead, create a separate "Testing" Windows user profile with limited access rights. Before opening the