To "prepare piece" in this context usually refers to one of the following actions depending on your goal:
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If you found this link on an anonymous board or suspicious forum, do not run any executables ( .exe , .scr , .vbs ) found inside. These naming conventions are sometimes used to disguise malware or "screamers." Use a sandbox environment or a site like VirusTotal to scan the file. To "prepare piece" in this context usually refers