I have changed the registry settings so that the user's folder is not saved in C: but in E:. Everything is working fine except for Vim (and Cygwin, but I don't want it now).
Whenever I launch Vim, it automatically creates a new folder C:\Users\Administrator and starts saving its files there.
That's because $HOME is C:\Users\Administrator. I want it to change so that it can point to my custom location.