@tempguest yep, that's right. it's not an essential file and windows would recreate it everytime if it gets deleted.
@winapp2.ini yep, it works. you can include it. %username% is the same as your windows username you are on. every windows user get it's own sandbox.
eg.
\Sandbox\tempguest\DefaultBox\
\Sandbox\Winapp2.ini\DefaultBox\
\Sandbox\randomcore\DefaultBox\
\Sandbox\%UserName%\DefaultBox\