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AWS appstream2: Add Credential Guard / memory integrity guidance for instances

Service: appstream2 · 2026-10-31 · Documentation medium

File: appstream2/latest/developerguide/instance-types.md

Summary

Adds an Important note that memory integrity (HVCI) is not supported and must be disabled before enabling Credential Guard, plus minor table formatting changes.

Security assessment

Documents security-hardening guidance around Credential Guard and memory integrity (HVCI) for Windows images, which is security best-practice documentation rather than a fix for a specific vulnerability.

Evidence

+ _Memory integrity_ , also known as _hypervisor-protected code integrity (HVCI)_ or _hypervisor enforced code integrity_ , isn't supported. Before you turn on Credential Guard, you must ensure this feature is disabled. For more information, see [Disable memory integrity](https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/credential-guard.html#disable-memory-integrity).

Diff

diff --git a/appstream2/latest/developerguide/instance-types.md b/appstream2/latest/developerguide/instance-types.md
index e3938f6..7086e43 100644
--- a//appstream2/latest/developerguide/instance-types.md
+++ b//appstream2/latest/developerguide/instance-types.md
@@ -25,0 +26,8 @@ If your use case involves real-time audio-video (AV) or other scenarios that req
+###### Important
+
+**Memory integrity**
+
+ _Memory integrity_ , also known as _hypervisor-protected code integrity (HVCI)_ or _hypervisor enforced code integrity_ , isn't supported. Before you turn on Credential Guard, you must ensure this feature is disabled. For more information, see [Disable memory integrity](https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/credential-guard.html#disable-memory-integrity).
+
+Enabling the feature may lead to performance or stability issues. We recommend disabling memory integrity in your Windows image. Credential Guard can remain enabled once memory integrity is disabled.
+
@@ -38 +45,0 @@ If you plan to use WorkSpaces Applications z1d-based instances, you must provisi
-**Graphics Design** | Uses AMD FirePro S7150x2 Server GPUs and AMD Multiuser GPU technology to support graphics applications that use DirectX, OpenGL, or OpenCL. | AppStream-Graphics-Design-`WinServerOperatingSystemVersion`-`MM-DD-YYYY`  
@@ -52 +59 @@ Note: For G6f and Gr6f, use images with date 07-28-2025 or later. | For stream.g
-Graphics G6e | Powered by NVIDIA L40S Tensor Core GPUs and third generation AMD EPYC processors. | [Import Image](./import-image.html) for Accelerated.g6e.* instance types  
+**Graphics G6e** | Powered by NVIDIA L40S Tensor Core GPUs and third generation AMD EPYC processors. | [Import Image](./import-image.html) for Accelerated.g6e.* instance types