Often, running the setup directly from a zipped folder causes this error.
Windows 7 security settings or third-party antivirus software can sometimes prevent the installer from moving files, leading to the "damaged" error. Error | Installer is damaged - Adobe Help Center adobe damaged installer fix photoshop windows 7 top
You specifically need VC++ 2015-2022 (x86 and x64). Without these, CC installers will always show as damaged. Often, running the setup directly from a zipped