Installer which launches cmd window not working on Windows XP

Installer which launches cmd window not working on Windows XP

I'm trying to install MinGW on a Windows XP machine. The installer I
downloaded has a GUI wizard to get some options from the user, then
launches a command window and runs through some script.
This worked flawlessly on a Windows 7 machine, but on the XP machine, it
only gets as far as launching this command window. The console remains
blank, with the cursor just flashing away forever.
What things might be preventing proper installation? How can I investigate
this?
Windows XP doesn't seem to have any sort of 'run as administrator' option
that I can see, so I'm not sure if this can be a permissions issue. The
user I'm logged in as has read-write access to both the location the .exe
is in, and the location I'm trying to install to.