Recently a weird problem has appeared, that I couldn't solve. He also couldn't indicate about a possible cause, since he is not really into computers.
The problem is that after playing any kind of media in the Windows Media Player, a folder appears on the desktop, containing nothing. It gets deleted with no problem, but at the moment there is a usage of the Media Player, this folder gets created again.
The folder is named every time with the same name, which happens to be one of his friends' name.