Windows 7 installation questions. 64 bit and outlook express


I have ordered 2 version of windows home premium for the two computers in my house.

I have one laptop, and one desktop pc.

They both have Vista Home 32 bit versions on.

My desktop has 3 gig RAM, quad core, and an Nvidea 8800 gt graphics card.

I am considering installing the 64 bit version onto the desktop. What are the advantages and disadvantages of 64 bit. Will some things not work, and will others run better, like games for example. Any information will be appreciated. I searched with google but was generally confused by what i found.

For the laptop, it has 1 gig of ram and a dual core processor.

I would like to know with this one, if i do an upgrade installation, rather than a clean install, will it keep everything on my computer. Im guessing yes but i thought i would ask someone who has done this themselves.

What im specifically looking to keep is my emails in outlook express. I know the system doesnt come with it installed, but if i install windows 7 on there, then get the free download of outlook, will it automatically have my emails on there.

If not, how would i go about backing them up, so i can then put them back on when outlook is installed? I have an external hard drive and a dvd writer.

Thanks in advance for anyone who can help.

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