What's driving me crazy is how the name is displayed in c:\users.
I registered myself in the exact same way on the PC and my first name appears in c:\users (as I would expect), but my daughters is shown as karen_000.
It does allow "rename", but I'm terrified of what the result might be!!
Would be much better to understand the logic behind this ridiculous naming of the user in c:\users!!!
This is actually set up like this on purpose. his is set up on purpose so that programs that dont use environmental paths will still function.
For example if I create a user account on my computer called "Alex" and I start to install all these programs that stores files inside the C:\users\Alex, then I go and rename the account to GoThePower all these programs will still be looking for the old account path. This is not an issue with Windows though, Microsoft had to make it this way because of the way other company's would code their applications. If you see the following files for example before renaming my user account the paths would be:
C:\users\Alex\Desktop\Fungame.exe
C:\users\Alex\Music\SuperCoolSong.mp3
Now if I rename my user account to GoThePower and Windows did rename the C:\users\Alex folder to C:\users\GoThePower, You would come along to launch your FunGame.exe and the program will start looking for this .exe file inside C:\users\Alex\Desktop\Fungame.exe as that was where it originally installed too. But of course it will not be able to find it because the new path of this file is called C:\users\GoThePower\Desktop\FunGame.exe, and all sorts of errors will come up saying the file can not be found etc. This is one of the reason's why Windows does not rename the folder.
Now take the other file C:\users\Alex\Music\SuperCoolSong.mp3 and this is stored inside your Music player with the above path and you rename the account to GoThePower, your music player will not be able to find your song that you previously had and would report it as missing or deleted.