Hi all ! I am a newbie to all these windows installation & all, so As the title says, i m a bit confused regarding installing a 64 bit version as i m presently running a Win -7 prof. 32-bit. I have a Core 2 duo E7400(2.8 Ghz), 500 GB HDD, 4Gb Ram(2Gb installed+getting 2 Gb soon from a friend), nvidia 512mb graphics. Now my main confusion is that i have partitioned my HDD in 5 drives with C drive being the primary/boot drive and rest of all containing movies, games & other data. SO i wanted to know if i try to install a 64 bit of Windows with a bootable disc will it install directly i.e. compressing old files into windows old folder or will it refuse to install saying u have a incompatible version installed. At most of places i have read that u will need to format the partition for installing a 64 bit versions, so is it possible to format only C drive in which i have my current OS installation while installing 64 bit using the option to load driver & which is i guess used when partitioning a new HDD. My only fear is i don't want to loose all my approx. 350 Gb in other logical partition. Any suggestion/clarification of my doubts will be really appreciated ! thanx !