Noted by others. White-list it, and all of Boost release zips. The zipping process produces effectively random patterns that trigger a false-positive antivirus signature match. Microsoft have been asked to whitelist it but . Don't panic ;-) Paul --- Paul A. Bristow Prizet Farmhouse Kendal UK LA8 8AB +44 (0) 1539 561830 From: Boost-users [mailto:boost-users-bounces@lists.boost.org] On Behalf Of Tim Burgess via Boost-users Sent: 24 December 2018 13:30 To: boost-users list Cc: tim@raisedbar.net Subject: [Boost-users] Problem downloading 1.69.0 for Windows Hi, Windows Defender is blocking my download from https://www.boost.org/users/history/version_1_69_0.html as it is identified as being unsafe. Can anybody advise, please? Best wishes. Tim Burgess Raised Bar Ltd. E: mailto:tim@raisedbar.net tim@raisedbar.net M: +44 (0)7989 486976