Differences

This shows you the differences between two versions of the page.

--- microsoft365:defender:defender_platform_corruption [2026/05/23 04:31] – created medic
+++ microsoft365:defender:defender_platform_corruption [2026/05/23 04:41] (current) – medic
@@ Line 1: / Line 1: @@
 ====== Defender platform corruption causing "Virus scan failed" downloads ======
+**Summary:** Microsoft Defender for Endpoint platform/update corruption causing Defender AV provider failures and browser download scanning failures. Defender platform upgrade partially failed, leaving endpoint registered against an outdated platform version and marking the newer platform as blocked.
+----
 User reported downloads failing in browser with:
@@ Line 6: / Line 10: @@
 Virus scan failed
 </code>
+{{:microsoft365:defender:virus_scan_failed.png?400|}}
 ----