Many modern antivirus programs (including Windows Defender) flag older SecuROM DRM files—used by GTA IV—as malware (specifically Trojans or HackTools). If the antivirus quarantines these files, the game launches, realizes the security check is missing, and throws RMN60.
Check "Run this program in compatibility mode for:" and select or Windows XP (Service Pack 3) .
Many modern antivirus programs (including Windows Defender) flag older SecuROM DRM files—used by GTA IV—as malware (specifically Trojans or HackTools). If the antivirus quarantines these files, the game launches, realizes the security check is missing, and throws RMN60.
Check "Run this program in compatibility mode for:" and select or Windows XP (Service Pack 3) . how to fix gta 4 fatal error rmn60