Using modified files to "spoof" Steam services can lead to account bans or restrictions.
Pirates often claim that antivirus warnings are "false positives" because the software "fools" DRM. While sometimes true, this is also the most common way malware distributors get users to disable their protection.
In gaming circles, "Steam Fix" or "Online Fix" files usually contain modified Dynamic Link Library (.dll) files—often a fake steam_api64.dll .
You cannot receive official patches or developer support once you have modified the game files with a third-party repair fix. Recommended Precautions If you choose to proceed, take these safety steps: 5 Reasons Not to Download Cracked Software