Here are a few options for the post, depending on where you are sharing it (e.g., a Minecraft forum, Discord, or a download site):
.exe, .bat, .vbs, or .jar files outside the mods/ folder. A legitimate client pack should only contain .jar (mods), .txt, .png, and .json files. No executables..jar mods are known (e.g., OptiFine_1.8.9_HD_U_I7.jar). If you see weird names like system-update.jar, delete immediately.If you are unsure, build your own 1.8.9 modpack manually using CurseForge. But for those seeking the convenience of CM-Pack-Client-1.8.9.zip, treat it as an “unknown bundle” until proven safe. File name- CM-Pack-Client-1.8.9.zip
Even with a flawless installation, you may encounter hurdles. Here are solutions to frequent problems: Here are a few options for the post,