I'm trying to run a command-line process (which is extraction of a .7z archive) on a file that lies in a temporary folder on the windows user temp directory (C:\Documents and Settings\User\Local Settings\Temp), using Process in my c# app.

I think the process return error that happens because of "access denied" because I can see a win32Exception with error code 5 when I dig in the prcoess object of .NET.

doing the same on some other location worked fine before, so I guess maybe it's something I'm not supposed to do ? (running a process to use a file on the the %TEMP%) perhaps I need to pass security somehow?