error log: installing GitHub.application on Windows 7

PLATFORM VERSION INFO
	Windows 			: 6.1.7601.65536 (Win32NT)
	Common Language Runtime 	: 4.0.30319.269
	System.Deployment.dll 		: 4.0.30319.1 (RTMRel.030319-0100)
	clr.dll 			: 4.0.30319.269 (RTMGDR.030319-2600)
	dfdll.dll 			: 4.0.30319.1 (RTMRel.030319-0100)
	dfshim.dll 			: 4.0.31106.0 (Main.031106-0000)

SOURCES
	Deployment url			: file:///C:/Users/username/Downloads/GitHub.application

IDENTITIES
	Deployment Identity		: GitHub.application, Version=1.0.17.7, Culture=neutral, PublicKeyToken=8f45a2159c87c850, processorArchitecture=x86

APPLICATION SUMMARY
	* Installable application.
	* Trust url parameter is set.
ERROR SUMMARY
	Below is a summary of the errors, details of these errors are listed later in the log.
	* Activation of C:\Users\Alex\Downloads\GitHub.application resulted in exception. Following failure messages were detected:
		+ Deployment and application do not have matching security zones.

COMPONENT STORE TRANSACTION FAILURE SUMMARY
	No transaction error was detected.

WARNINGS
	There were no warnings during this operation.

OPERATION PROGRESS STATUS
	* [7/23/2012 3:06:24 PM] : Activation of C:\Users\Alex\Downloads\GitHub.application has started.
	* [7/23/2012 3:06:31 PM] : Processing of deployment manifest has successfully completed.
	* [7/23/2012 3:06:31 PM] : Installation of the application has started.

ERROR DETAILS
	Following errors were detected during this operation.
	* [7/23/2012 3:06:31 PM] System.Deployment.Application.InvalidDeploymentException (Zone)
		- Deployment and application do not have matching security zones.
		- Source: System.Deployment
		- Stack trace:
			at System.Deployment.Application.DownloadManager.DownloadApplicationManifest(AssemblyManifest deploymentManifest, String targetDir, Uri deploymentUri, IDownloadNotification notification, DownloadOptions options, Uri& appSourceUri, String& appManifestPath)
			at System.Deployment.Application.DownloadManager.DownloadApplicationManifest(AssemblyManifest deploymentManifest, String targetDir, Uri deploymentUri, Uri& appSourceUri, String& appManifestPath)
			at System.Deployment.Application.ApplicationActivator.DownloadApplication(SubscriptionState subState, ActivationDescription actDesc, Int64 transactionId, TempDirectory& downloadTemp)
			at System.Deployment.Application.ApplicationActivator.InstallApplication(SubscriptionState& subState, ActivationDescription actDesc)
			at System.Deployment.Application.ApplicationActivator.PerformDeploymentActivation(Uri activationUri, Boolean isShortcut, String textualSubId, String deploymentProviderUrlFromExtension, BrowserSettings browserSettings, String& errorPageUrl)
			at System.Deployment.Application.ApplicationActivator.ActivateDeploymentWorker(Object state)

COMPONENT STORE TRANSACTION DETAILS
	No transaction information is available.