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

Updated 2 weeks 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 may need to create a new Administrator account on your device first to be able to complete step 2.
  1. Go to the C:\Users\ folder and rename your user folder (it shouldn't contain non-Latin characters or spaces)
  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.

Check Multilogin installation disk drive

To function properly, Multilogin has to be installed on the same disk drive where your OS is installed. For example, if your OS is installed on Drive C, Multilogin should also be installed on Drive C. If it's not the case, uninstall Multilogin and reinstall it on the same disk drive as your OS. You can find more details in this article.

Reinstall Microsoft Visual C++

Often the issue is caused by outdated Microsoft Visual C++ components installed on your device. You can find step-by-step instructions on how to resolve this issue in this article.

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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