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Recynon - The attachment is safe. In the above attachment I embedded the flash projector along with the shockwave file directly into the client. The reason that Windows Security has given that warning is because it has flagged flash projector, and flash in general, as malicious. This is probably because flash has multiple security issues and anything Flash related has long since reached it's EOL (End of Life), so it's likely Windows Security, along with other vendors, would erroneously flag an application like flash projector as malicious.
If you're still not convinced, you can download Flash Player Projector 32 from the official Adobe website and scan them with Windows Security, Virus Total or Jotti. Here's a link to the website:
https://www.adobe.com/support/flashp...downloads.html
Here's the Virus scans for the Windows version of Flash Player Projector (SAFlashPlayer.exe):
https://www.virustotal.com/gui/file/...5fd188746066f0
https://virusscan.jotti.org/en-GB/fi...job/sys0619r44
As you can see the security vendors are giving a false positive result and suggesting the flash projector has some kind of Trojan virus. It's either the case that the flash projector from Adobe's official website is compromised (unlikely possibility) or that the security vendors are giving an erroneous or false positive result. Note that it could be the case that these security vendors are flagging anything flash related as malicious, due to flash's security issues and the fact that the EOL for flash has long since past. If you have any other concerns, please go ahead and ask me.