If an antivirus identifies it as malicious, delete it immediately.
Sometimes users confuse "Selectfire" with crossfire.dll or other legitimate DirectX/system files. If you are experiencing a "missing .dll" error, it is likely related to crossfire.dll or a similar, legitimate file, and fixing it involves updating graphics drivers or reinstalling the game. To give you the most accurate advice, I need to know: did you find this file (what folder path)? Are you seeing a specific error message ?
Run a full scan using updated security software (e.g., Windows Defender, Malwarebytes).
Placing a malicious DLL next to a trusted executable to bypass security. What to do if you found Selectfire.dll : Do Not Execute: Do not try to run or register this file.

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