Supporting Windows

The user has to be logged in for the variable %username% to work.

"For security, Win 7/Vista forbids programs from writing to a variety of "sensitive" areas, among them the Windows folder and the Program Files folder. That includes all subfolders of Program Files, so this ban would be a hardship on older programs that store INI files or data files along with the program itself. To avoid disabling these programs, Windows 7/Vista lies to them. When they try to write to a banned location, it says "Sure, no problem!" but actually saves the data in a holding area called the Virtual Store. And when the program tries to read back the data it wrote, Win7/Vista slips in the data from the Virtual Store. The old program works fine, and other programs aren't affected. A similar process handles programs that write to now-forbidden areas of the Registry"