快播视频's Information Security team is aware of a spike in false positive antivirus detections by Windows Defender against benign activity in the powershell.exe and svchost.exe processes. The issue is believed to have begun around the evening of November 26th, 2025, and had widespread impact on November 27th, 2025. Impacted computers displayed periodic desktop notifications and may have prevented webcams from functioning. A sample false positive detection is pictured below:
The cause of the issue appears to have been an issue in a recent version of Microsoft Defender's security intelligence (cloud-based updates). The issue is believed to have impacted other organizations, not just 快播视频. Microsoft has acknowledged the issue and confirmed that it was fixed in security intelligence version 1.441.548.0.
Most computers should have received a patched security intelligence update by the time of writing as they are generally updated automatically. However, users still experiencing this issue can update their security intelligence manually. To do so, open the Windows Security app, go to Virus & threat protection, click on Protection updates, and click on Check for updates.
