Hi everyone, I am using a HP laptop : Mw Windosw XP SP2, Intel Pentium M Processor 2.00 GHZ, 1,0 GB RAM, ATI MOBILITY RADEON X600 and PTE V5 runs as waell as PTE 4.48. I never used PTE on a desktop so I cannot tell but was is certain is that PTE V5 does run on laptop ! I hope this is useful for those in doubt ! Henri