From the article: The first idea was to change the username to one that does not contain Polish characters. It turned out that Windows does not rename the user

From the article: The first idea was to change the username to one that does not contain Polish characters. It turned out that Windows does not rename the user’s folder when changing the username. Manually renaming the folder was not an option. This way I could corrupt my profile in the system. The end of the article is about how to change the directory where the temporary files go to one not under the user folder.