When good browsers go bad: Copying the Default User Profile fails due to Chrome Extension read permission errors.
Recent we had a machine unable to log new users into it. The event log showed that the following data could not be copied into a new user profile: \\?\C:\Users\Default\AppData\Local\Google\Chrome\User Data\Default\Extensions\[random characters\[version]
The core problem here is that Google had added the extensions to the default profile, but had not given the Everyone account Read access. This prevents the profile copy from the default to the new user. Simply going to C:\Users\Default and changing the permissions to reset all child files to the same as the folder itself allowed the profile to be created normally.