Pretty much anything will run an 034 unit, basically to ensure total functionality, here is what's required:
-Win 98 min or newer
-800x600 screen resolution or higher
-100mhz processor or faster
I like to keep my laptop fully dedicated for tuning, that way windows updates and expired virus scan notices aren't poping up at unopportune times, etc.
Also don't slow the machine down with a lot of start up menu items, I prefer to have all other programs closed.
Basically your average $200 refurb machine is perfect for this stuff, some people thing that a $1k new machine will work better, but it won't really add anything. Its the ECU processor that has to work fast, not the software.