Windows Defender and other anti-virus applications flagged the uTorrent BitTorrent client as “potentially unwanted software” this week, TorrentFreak reported.
BitTorrent regarded the warnings as false positives, but stopped offering a version of the software for download.
The reason for the issue has not been confirmed, but TorrentFreak speculated it may be related to Lavasoft’s Ad-Aware.
BitTorrent said it believes Windows Defender’s previous passive flag of uTorrent changed to active with a Microsoft “patch Tuesday” update.
Only a small percentage of users are affected, said BitTorrent.
“We had three uTorrent executables being served from our site. [One], which was going to 5% of users, was part of the Windows block. We stopped shipping that and confirmed we are no longer seeing any blocks.”