You already asked this same basic question in another thread: http://forums.cnet.com/7723-19411_102-539446.html
Why not just continue on there?
I have an Aspire 5100 laptop. It is a 64 bit processor. It came with Vista. I have 2 GB or Ram. I bought the Win 7 upgrade. It came with 2 discs; a 32 bit and a 64 bit. I loaded the 32 bit by mistake. Is there as way to correct this or is it even necessary. I am having some difficulty with some of the programs, particularly Media player. someone mentioned that there may need to be additional drivers added to complete the upgrade. HELP! looking for a solution.