Installer Issue?

[Anubuss]

Given I haven't heard of anyone else reporting this issue, there must be something unique to my machine going on here, but...

3 days ago (2/6/2026), I tried installing the patch update, and the installer displayed an error stating that it could not start the Software and advised me to contact the Vendor. I reached out to Daybreak support. After trying all their troubleshooting steps (including uninstalling MTGO completely) and sending them all my log files, they don't see any issue with my PC and referred me here.

It appears the updates downloaded successfully, but as soon as it attempts to commit the installation, it fails.

Attached are my logs. I hope someone can resolve the issue so I can resume playing.

 

[Anubuss]

Installer Log:

PLATFORM VERSION INFO
Windows : 10.0.26200.0 (Win32NT)
Common Language Runtime : 4.0.30319.42000
System.Deployment.dll : 4.8.9221.0 built by: NET481REL1LAST_25H2
clr.dll : 4.8.9221.0 built by: NET481REL1LAST_25H2
dfdll.dll : 4.8.9221.0 built by: NET481REL1LAST_25H2
dfshim.dll : 10.0.26100.1882 (WinBuild.160101.0800)

SOURCES
Deployment url : http://mtgo.patch.daybreakgames.com/patch/mtg/live/client/MTGO.application
Server : AkamaiNetStorage
Deployment Provider url : http://mtgo.patch.daybreakgames.com/patch/mtg/live/client/MTGO.application
Application url : http://mtgo.patch.daybreakgames.com...3.4.154.4645.20260205150101/MTGO.exe.manifest
Server : AkamaiNetStorage

IDENTITIES
Deployment Identity : MTGO.application, Version=3.4.154.4645, Culture=neutral, PublicKeyToken=a7d96b15d2cce030, processorArchitecture=msil
Application Identity : MTGO.exe, Version=3.4.154.4645, Culture=neutral, PublicKeyToken=a7d96b15d2cce030, processorArchitecture=msil, type=win32

APPLICATION SUMMARY
* Installable application.

ERROR SUMMARY
Below is a summary of the errors, details of these errors are listed later in the log.
* Activation of http://mtgo.patch.daybreakgames.com/patch/mtg/live/client/MTGO.application resulted in exception. Following failure messages were detected:
+ Access to the path 'C:\Users\16165\AppData\Local\Temp\Deployment\GKZ51JDR.8BL\G5TWZ5ZE.N3Y\MTGO.exe' is denied.

COMPONENT STORE TRANSACTION FAILURE SUMMARY
No transaction error was detected.

WARNINGS
There were no warnings during this operation.

OPERATION PROGRESS STATUS
* [2/9/2026 8:51:55 PM] : Activation of http://mtgo.patch.daybreakgames.com/patch/mtg/live/client/MTGO.application has started.
* [2/9/2026 8:51:55 PM] : Processing of deployment manifest has successfully completed.
* [2/9/2026 8:51:55 PM] : Installation of the application has started.
* [2/9/2026 8:51:56 PM] : Processing of application manifest has successfully completed.
* [2/9/2026 8:52:05 PM] : Found compatible runtime version 4.0.30319.
* [2/9/2026 8:52:05 PM] : Request of trust and detection of platform is complete.
* [2/9/2026 8:52:53 PM] : Downloading of subscription dependencies is complete.
* [2/9/2026 8:52:53 PM] : Commit of the downloaded application has started.

ERROR DETAILS
Following errors were detected during this operation.
* [2/9/2026 8:52:54 PM] System.UnauthorizedAccessException
- Access to the path 'C:\Users\16165\AppData\Local\Temp\Deployment\GKZ51JDR.8BL\G5TWZ5ZE.N3Y\MTGO.exe' is denied.
- Source: mscorlib
- Stack trace:
at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
at System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, Int32 rights, Boolean useRights, FileShare share, Int32 bufferSize, FileOptions options, SECURITY_ATTRIBUTES secAttrs, String msgPath, Boolean bFromProxy, Boolean useLongPath, Boolean checkHost)
at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share)
at System.Deployment.Application.PEStream.ConstructFromFile(String filePath, Boolean partialConstruct)
at System.Deployment.Application.Manifest.AssemblyManifest.LoadFromInternalManifestFile(String filePath)
at System.Deployment.Application.ComponentStore.PrepareInstallPrivateAssembly(StoreTransactionContext storeTxn, DependentAssembly privAsm, DefinitionAppId appId, String appPayloadPath)
at System.Deployment.Application.ComponentStore.PrepareStageAppComponent(StoreTransactionContext storeTxn, CommitApplicationParams commitParams)
at System.Deployment.Application.ComponentStore.PrepareCommitApplication(StoreTransactionContext storeTxn, SubscriptionState subState, CommitApplicationParams commitParams)
at System.Deployment.Application.ComponentStore.CommitApplication(SubscriptionState subState, CommitApplicationParams commitParams)
at System.Deployment.Application.SubscriptionStore.CommitApplication(SubscriptionState& subState, CommitApplicationParams commitParams)
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, Uri& deploymentUri)
at System.Deployment.Application.ApplicationActivator.PerformDeploymentActivationWithRetry(Uri activationUri, Boolean isShortcut, String textualSubId, String deploymentProviderUrlFromExtension, BrowserSettings browserSettings, String& errorPageUrl)
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Deployment.Application.ApplicationActivator.PerformDeploymentActivationWithRetry(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.

 

[Firedrake]

+ Access to the path 'C:\Users\16165\AppData\Local\Temp\Deployment\GKZ51JDR.8BL\G5TWZ5ZE.N3Y\MTGO.exe' is denied.

Just off the top of my head, the above Error Message seems to hint you don't have Administrator rights to your own computer.

 

[Anubuss]

Just off the top of my head, the above Error Message seems to hint you don't have Administrator rights to your own computer.

Yeah, that was the first thing I checked, but even when I run the installer "as Administrator" I get the same issue.

I had no issue installing prior to the Patch, so my system settings are fine.

 

[Torbin]

Try a clean install https://help.mtgo.com/hc/en-us/articles/6046678010779-How-do-I-perform-a-clean-installation-of-MTGO

Yeah, that was the first thing I checked, but even when I run the installer "as Administrator" I get the same issue.

I had no issue installing prior to the Patch, so my system settings are fine.

 

[Anubuss]

Try a clean install https://help.mtgo.com/hc/en-us/articles/6046678010779-How-do-I-perform-a-clean-installation-of-MTGO

That was already attempted as part of the troubleshooting progress. That clean install is why I no longer have MTGO installed anymore.

 

[Torbin]

That was already attempted as part of the troubleshooting progress. That clean install is why I no longer have MTGO installed anymore.

did you do a click once cache clear. Make sure the 2.0 folder was totally deleted and then restart? Just asking because these steps can stop the process from totally removing it from your computer.

 

[Anubuss]

did you do a click once cache clear. Make sure the 2.0 folder was totally deleted and then restart? Just asking because these steps can stop the process from totally removing it from your computer.

Yes.

 

[Torbin]

Yes.

ok going to see if a Dev can look at your logs.

 

[Anubuss]

ok going to see if a Dev can look at your logs.

let me know if you need my MSinfo log, that one was too big to attach here

 

[Anubuss]

ok going to see if a Dev can look at your logs.

any update on this? I miss being able to play

 

[Torbin]

any update on this? I miss being able to play

I’ve followed up with the team again. Based on their review of the installer, they’re not seeing any issues on their end.

One thing that did come up with another user yesterday: Windows 11 was creating a new folder with each update and not selecting the correct install directory. In that case, they deleted the 2.0 folder, restarted, and when it reappeared, deleted it again. After that, the reinstall worked properly.

QA also tested this scenario and wasn’t able to replicate the issue, so the dev team is currently investigating why Windows may be blocking or misrouting the install in your case.

I apologize for the delay. I reached out to the team yesterday for an update and am still waiting to hear back. I’ll follow up as soon as I have more information.

 

[Torbin]

any update on this? I miss being able to play

Try deleting C:\Users\16165\AppData\Local\Temp\Deployment\GKZ51JDR.8BL\G5TWZ5ZE.N3Y\MTGO.exe and then do a clean install.

 

[Anubuss]

I tried the suggested options, and those didn't fixed my issue

 

[Anubuss]

So I had some days off work for a medical procedure over the weekend, and I was stressing about it, so I took it upon myself to take a drastic measure for a possible fix.
I backed up my PC, completely uninstalled Windows, reinstalled Windows, restored my lost files, and then reinstalled everything else.
I now have MTGO on my PC again. I still have copies of my old log files from a failed install attempt if you need them.

 

[Torbin]

So I had some days off work for a medical procedure over the weekend, and I was stressing about it, so I took it upon myself to take a drastic measure for a possible fix.
I backed up my PC, completely uninstalled Windows, reinstalled Windows, restored my lost files, and then reinstalled everything else.
I now have MTGO on my PC again. I still have copies of my old log files from a failed install attempt if you need them.

so the issue per the dev team was that windows was blocking the install which is why they said to delete that file location totally. I am sorry it did not work and you had to go back through and reinstall windows.