Cheat Engine is a powerful tool, but it is often flagged by Antivirus software as a "PUP" (Potentially Unwanted Program) because it "hooks" into other processes. If you are downloading the portable version, always ensure you are getting it from a reputable source like the official GitHub or the Cheat Engine forums to avoid actual malware.
While Cheat Engine 6.9 Portable is generally safe to use, there are some safety precautions that users should be aware of: cheat engine 69 portable