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Error: Your Windows system cannot perform the necessary WinAPI calls to launch Stealthfox browser

Updated 1 month ago by Yelena

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Sometimes you may encounter the following error in Multilogin: "Your Windows system cannot perform the necessary WinAPI calls to launch Stealthfox browser".

It occurs when Windows API cannot be utilized properly if a Windows user folder has non-Latin characters (Russian, Arabic, Chinese, etc.). This article describes how to fix this issue.

Create a new Windows user

The easiest solution is to create a new Windows user with Administrator right. This user should have a name that only contains Latin characters. On this page you will find step-by-step instructions on how to do it.

To save time while creating a new user, you can select "I don't have this person's sign-in information", and on the next page select "Add a user without a Microsoft account".

Change your Windows username

  1. Make sure that your current user has Administrator rights
You might need to create a new Administrative account on your device first.
  1. Go to the C:\Users\ folder and rename your user folder (it shouldn't contain non-latin characters)
  2. Open Regedit and navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\ProfileList\<User SID>\
  3. Modify the registry value ProfileImagePath to the new pathname
The ProfileList registry key contains a number of sub-keys. To find the sub-key with the right ProfileImagePath, click on each sub-key and examine its value.

For example, let's say we want to get rid of the space in a username. So in Step 2, we use the File Explorer to navigate to the C:\Users folder and rename the John Smith subfolder to JohnSmith. In Step 3, we click each <User SID> sub-key until we find the one with ProfileImagePath C:\Users\John Smith. In step 4 we change it to C:\Users\JohnSmith.

Reinstall Windows

If the issue persists, the last solution would be to reinstall Windows and specify a username without non-Latin characters in the installation process.


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