Look at some files between the two computers to see what may be different:

I would look at:
all .par files --> are they the same content on both PCs?
the .fac file, if you are using it
the Assets.dta file for your used assets (spread simulation info)
the .bar files --> check file sizes

If the strategy is the same and the broker is the same... then technically you can make the .par, .fac, .bar and Assets.dta files all the same and then you should get identical results