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New Member

Cannot launch Power Automate Desktop (Preview) app


I have a Win 10 VM working on, and have downloaded/installed Setup.Microsoft.PowerAutomate.UIFlow.

 When trying to create a new flow, either from the web, orr by double-clicking on the shortcut, the app is not launching.

All required extensions are enabled on Chrome and there are no errors in the Event Viewer.

I’ve already tried Uninstalling – running Win Updates – reinstalling w/o luck.

Any suggestions?


Hello nikosan,

Please perform the following actions:

  1. Uninstall PAD
  2. Delete the contents of the following folder: %LocalAppData%\Microsoft\Power Automate Desktop (Preview)\Cache (To navigate there, open a windows explorer and paste the string above in the address bar)
  3. Reinstall PAD

Let us know if you still can't launch PAD after this.


hi Kostas


I could not find this folder. only related folders:


- PowerAutomate

- PowerAutomate.Desktop



Hi Nikos

Please remove both folders, uninstall and install the PAD client. 

You can find the installation file here:



Hi Kostas,


Solved it.


Problem was with the Workspace declaration in config.json file under PowerAutomate folder (C:\users\AAAA\AppData\Local\Microsoft\PowerAutomate). it was pointing in shared folder rather than a local one.


"_recentWorkspaces": [],
"_workspaceDirectory": "\\aaa\\bb\\cc"


Once having changed that, it worked fine.

Not applicable

I have a similar issue. 


I installed Setup.Microsoft.PowerAutomate.UIFlow.exe

And when I start UI flows and PAD (both as administrator) I can see the following processes running in Task Manager:

  • UIFlowService
  • Power Automate Desktop (32 bit)
  • Microsoft.Flow.RPA.LauncherService
  • Microsoft UI Flows

However, the UI of PAD simply does not show up.


I already followed the above, and it did not work for me. Some things to mention:

  • My cache folder was empty, so I had nothing to remove.
  • I have never been able to run PAD. This would be my first time launching the software on this pc. I think this is why my cache folder is empty?
  • I did use WinAutomation however since I was investigating the software. I now found out that it is evolving into the Power Automate Platform. Maybe WinAutomation and PAD are interfering with each other?
  • I am using the Power Automate Platform in combination with a free Microsoft Tenant Account/Environment obtained from Maybe this limits the use of PAD?
  • I am logged in to my laptop with a Microsoft account that is different from the Microsoft account obtained from the free Tenant. Is this a problem?
  • If WinAutomation is running, Power Automate is able to activate a WinAutomation process via UI Flow ✔️ So that connection does work. 


Any help will be greatly appreciated,


As mentioned, in my case problem was with the following file:

Problem was with the Workspace declaration in config.json file under PowerAutomate folder (C:\users\AAAA\AppData\Local\Microsoft\PowerAutomate). it was pointing in shared folder rather than a local one.


"_recentWorkspaces": [],
"_workspaceDirectory": "\\aaa\\bb\\cc"


Once having changed that, it worked fine.


In your case, since you mentioned (I am logged in to my laptop with a Microsoft account that is different from the Microsoft account obtained from the free Tenant. Is this a problem? ), I would also try using the right credentials - the ones having access to the tenant/PAD license.



Not applicable

Thanks for your response


The weird thing is I can't find such a folder on my pc. The only folder I can find that looks like it is:

- C:\Users\my_username\AppData\Local\Microsoft\Power Automate Desktop (preview).

This folder contains a Cache folder, but that is empty, so I cannot configure anything...

Frequent Visitor

I had this issue as well. I was able to launch the PAD after uninstalling the app, then first installing only the UI Flows, then modifying the install to include the PAD. It's a strange work around but it did resolve my issue twice now. Hope this helps

New Member

I am having the same issue here. Installed the chrome extensions and PAD. Also tried the few suggestions here but to no avail. Am using windows 10 64-bit operating system. No error message appear in event viewer. Hope someone can help me.

New Member

It's the same in my case and I can't launch PDA


The weird thing is I can't find such a folder on my pc. The only folder I can find that looks like it is:

- C:\Users\my_username\AppData\Local\Microsoft\Power Automate Desktop (preview).

This folder contains a Cache folder, but that is empty, so I cannot configure anything...

Isn't there any solution for it?
Regular Visitor

Hello, I'm having the same problem.


Below folder has Cache folder in it but it's empty.

- C:\Users\my_username\AppData\Local\Microsoft\Power Automate Desktop (preview).


and when I launch, it doesn't open as app but it shows running in task manager.


Please advise.

Kudo Collector
Kudo Collector

1. Are you trying to run the free trial?  It won't work, you need a full license assigned to you.

2. Are you running Windows Home Edition? It only works on Windows Pro or Windows Server.

Not applicable

Thank you for your reply, 


I have a Per user plan with attended RPA trial plan. When another person downloads PAD they get the possibility to log in using a Microsoft account. When they use my account they can log in and use PAD perfectly fine. When they create a flow using PAD, it also shows up in the Power Automate web interface. Therefore I don't think this is subscription related. 

If I try to start PAD I don't even get such a screen. Also, I am using Windows 10 Pro on my machine.


Is there anything else I can check?

Thanks in advance.

Frequent Visitor

I am having a Power Automate Desktop launch issue.  I have updated .NET to 4.8 and reinstalled Power Automate Desktop / UiFlows several times, using all the techniques referenced above.


UiFlow Version:


OS Version:

1803 (OS Build 17134. 1845)


.NET 4.8 version 


Event Viewer Error:

Message = Element not found. (Exception from HRESULT: 0x80070490)
Error = System.Exception
Full text = System.Exception: Element not found. (Exception from HRESULT: 0x80070490)
at Windows.UI.ViewManagement.UISettings.add_TextScaleFactorChanged(TypedEventHandler`2 handler)
at System.Runtime.InteropServices.WindowsRuntime.WindowsRuntimeMarshal.NativeOrStaticEventRegistrationImpl.AddEventHandler[T](Func`2 addMethod, Action`1 removeMethod, T handler)
at System.Runtime.InteropServices.WindowsRuntime.WindowsRuntimeMarshal.AddEventHandler[T](Func`2 addMethod, Action`1 removeMethod, T handler)
at WinAutomation.UI.Common.FontSizeManager.Register(ResourceDictionary dictionary) in D:\a\1\s\src\WinAutomation.Desktop\WinAutomation.UI.Common\FontSizeManager.cs:line 35
at WinAutomation.Console.Host.App.<>c__DisplayClass5_0.<OnStartup>g__OnStartupInternal|0() in D:\a\1\s\src\WinAutomation.Desktop\WinAutomation.Console\WinAutomation.Console.Host\App.xaml.cs:line 94
at WinAutomation.Logging.LoggerTraceOperationExtensions.TraceOperation[T](ILogger`1 logger, String methodName, Action logEventAction, Action func, Func`1 getSuccessMessage, Func`2 getFailureMessage, LogData[] data) in D:\a\1\s\src\WinAutomation.Desktop\WinAutomation.Logging\LoggerTraceOperationExtensions.cs:line 80
at WinAutomation.Console.Host.App.OnStartup(StartupEventArgs e) in D:\a\1\s\src\WinAutomation.Desktop\WinAutomation.Console\WinAutomation.Console.Host\App.xaml.cs:line 61
at System.Windows.Application.<.ctor>b__1_0(Object unused)
at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)

Not applicable

I managed to fix this issue by installing the Power Automate Desktop standalone installation that is available through Earlier this installation was combined with UI Flows.

I think Microsoft updated the installing experience, and that fixed my issues.




New Member

I thought I had encountered the same problem, and each time I had to uninstall then install the app to launch. But after I asked our IT and found out that the app icon is minimized to the system tray (right side of the task bar where the speaker, network, clock icons are). All I needed to do is double clicking on icon in the system tray to launch it!😂

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