Hello, Agustino
Welcome to Microsoft Community.
Did you get this error while trying to join the Windows Insider Program? Some people have faced similar issues before and found a fix by tweaking the registry. Here's what you can try:
- Search for and open
regeditfrom the Start menu. - Navigate to
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\WindowsSelfHost. - Right-click the
WindowsSelfHostfolder in the left-hand tree and select delete. - Restart your computer. The system will recreate the
WindowsSelfHostkey upon reboot.
Warning***:***Be very careful when using the Registry Editor. Incorrectly editing the registry can cause serious problems that might require you to reinstall your operating system and could lead to data loss. To protect yourself, make sure to back up the registry before making any changes. This way, you can restore it if something goes wrong. How to back up and restore the registry in Windows - Microsoft Support
Also, make sure you don't have any third-party security software, VPNs, or proxy servers running on your computer.
If it still doesn't work, it might be an issue on Microsoft's end. You might just need to wait a bit and try again later.
Yuhao L
Microsoft Community Technical Support