diff --git a/Startup Scripts/SandboxStartup.ps1 b/Startup Scripts/SandboxStartup.ps1
index 0e4c62f..86f5149 100644
--- a/Startup Scripts/SandboxStartup.ps1	
+++ b/Startup Scripts/SandboxStartup.ps1	
@@ -26,7 +26,7 @@ reg add "HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced" /v "H
 reg add "HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced" /v "Hidden" /t REG_DWORD /d 1 /f
 
 # Fix for slow MSI package install. See: https://github.com/microsoft/Windows-Sandbox/issues/68#issuecomment-2754867968
-reg add HKLM\SYSTEM\CurrentControlSet\Control\CI\Policy /v VerifiedAndReputablePolicyState /t REG_DWORD /d 0 /f
+reg add "HKLM\SYSTEM\CurrentControlSet\Control\CI\Policy" /v "VerifiedAndReputablePolicyState" /t REG_DWORD /d 0 /f
 CiTool.exe --refresh --json | Out-Null # Refreshes policy. Use json output param or else it will prompt for confirmation, even with Out-Null
 
 # Change execution policy for powershell to allow running scripts. Normally it shows an error about a more specific policy (Process level Bypass policy), but it doesn't matter so we hide it via try/catch