YES I FOUND IT

YESSSSSSSSSSSSSSSSSSSSSSSSSs


i found out the problem why my COMPAQ PRESARIO SR1155AP cannot run windows xp professional from home edition.

because i try to use the OEM cd to UPGRADE the home edition but they cannot because they said the version is to new from the version on the hardddisk. then that time i went to sim lim i enter the game shop to find some computer games which i like . then i come across the BIG BIG BIG BOX WHICH WRITTEN MICROSOFT WINDOWS XP PROFESSIONAL ((( AT THE CORNER THERE WRITTEN (((upgrade only))) THEN I READ THE SPEC AND THEY WRITTEN FOR ))) for windows 95, 98, 98SE, ME , 2000, NT4.0 and windows XP home

wow that really shock my brain shahaha
hahaha
i now really know
that really cost about 100+++ $$$SG$$$
that a academic version
hgehehe