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AWS workspaces: Added hibernation warning for nested virtualization

Service: workspaces · 2026-09-06 · Documentation low

File: workspaces/latest/adminguide/running-mode.md

Summary

Warning about data loss when stopping WorkSpaces with nested virtualization on specific OS versions.

Security assessment

Reliability/data loss warning without direct security impact.

Evidence

WorkSpaces running Windows Server 2025, Windows 11 24H2, or Windows 11 25H2 with nested virtualization enabled do not support hibernation. When these WorkSpaces are stopped, unsaved data will be lost.

Diff

diff --git a/workspaces/latest/adminguide/running-mode.md b/workspaces/latest/adminguide/running-mode.md
index fe38a9c68..0ea118b1e 100644
--- a//workspaces/latest/adminguide/running-mode.md
+++ b//workspaces/latest/adminguide/running-mode.md
@@ -31,0 +32,4 @@ AutoStop GPU-enabled WorkSpaces and GeneralPurpose.4xlarge or GeneralPurpose.8xl
+###### Important
+
+WorkSpaces running Windows Server 2025, Windows 11 24H2, or Windows 11 25H2 with nested virtualization enabled do not support hibernation. When these WorkSpaces are stopped, unsaved data will be lost. We recommend using AlwaysOn running mode for these WorkSpaces to avoid data loss. For more information, see [Nested virtualization for WorkSpaces Personal](./nested-virtualization.html).
+