I recently bought a DELL STUDIO 1555 on June 12. Since Free windows upgrade is for the systems purchased after June 26 i am not getting a upgrade. I am from INDIA. I contacted Dell Customer Service here. They said i cannot purchase it from them also. Actually they had very less information about Windows 7. All they just said is that since my system is bought before June 26 i am not eligible. They had no further information about it. I have Two Questions Q1. Why Can't i purchase OEM version of windows 7 from DELL? Q2.Since my laptop is shipped with OEM version of WINDOWS VISTA HOME PREMIUM 32 BIT SP1, if i purchase a WINDOWS 7 HOME PREMIUM UPGRADE PACK from Microsoft / Amazon etc,. Can i install it on my machine ?? Can i install WINDOWS 7 by formatting C Drive or should it be installed over Vista ??