ok understood, thanks. tama nga yung sabi mo na hindi pwede install on several pc's pag single license. kasi i remember now, i had an original windows 2000 cd licensed for only 1 comp. ok siya when i installed it on my 1st pc but when i tried to install it on another pc ayaw mag-register. afaik volume license yung xp pro na hiningi ko last month, di ko lang alam kung ilan comp sya pwede. when i installed it in my pc and in my laptop and registered it ok naman nag-register pareho even if it was already installed on 3 comps here on the rig.