Malware and Virus Safe

Every downloadable release is sent to Microsoft for a virus check. The first few days a new file goes online for download, the windows security virus scanner will block that download with a notice that the file is unsafe. The reason is because the file is not known to Microsoft.

When the file first goes online it is immediately reported to Microsoft. So if you receive a message that the file is unsafe its because the file has just been put online and Microsoft still needs time to verify it.