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Fix slow MSI package installations in Windows Sandbox#340671

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denelon merged 1 commit intomicrosoft:masterfrom
kris6673:msi-tester-fix
Mar 27, 2026
Merged

Fix slow MSI package installations in Windows Sandbox#340671
denelon merged 1 commit intomicrosoft:masterfrom
kris6673:msi-tester-fix

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@kris6673 kris6673 commented Feb 18, 2026

Adjustments made to the SandboxTest.ps1 script to address the slow installation of MSI packages after the update KB5051987.
Line 775 is where the change is, other stuff is just linting.

Microsoft Reviewers: Open in CodeFlow

@kris6673 kris6673 requested a review from denelon as a code owner February 18, 2026 20:32
@microsoft-github-policy-service microsoft-github-policy-service bot added the Needs-Attention This work item needs to be reviewed by a member of the core team. label Feb 18, 2026
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denelon commented Feb 18, 2026

It looks like this is a documented approach over at:
https://learn.microsoft.com/windows/security/application-security/application-control/app-control-for-business/appcontrol

The issue appears to be related to a call out for Defender (which doesn't exist by default in Windows Sandbox) and it has a very long timeout.

@Trenly do you have any concerns with this?

@microsoft-github-policy-service microsoft-github-policy-service bot added the Moderator-Approved One of the Moderators has reviewed and approved this PR label Feb 20, 2026
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Trenly commented Mar 26, 2026

@denelon

@denelon denelon merged commit cefc320 into microsoft:master Mar 27, 2026
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@microsoft-github-policy-service microsoft-github-policy-service bot removed the Needs-Attention This work item needs to be reviewed by a member of the core team. label Mar 27, 2026
@kris6673 kris6673 deleted the msi-tester-fix branch March 27, 2026 16:20
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