Several questions before upgrading from Windows Vista Home Premium to Windows 7

#1
I’m currently running Windows Vista Home Premium (upgrade from XP) 32 bit and planning to upgrade to Windows 7 64 bit. I have 2 drives C&D, OS is on C. I understand that I will need to do a clean install to go from 32 bit to 64 bit. My question is:
Since I have a lot of programs on the “Dâ€Â￾ drive will I have to reformat that drive also for 64 bit or will I be alright the way they are. My largest program is World of Warcraft which is huge. I’m not so worried about reloading other programs which are much smaller.
I'm not a noob but also not an expert. So please keep responses in somwhat laymans terms. Thank you in advance for the help.
 


#2
Thank you for the information. I'm looking forward to going 64 bit.
 


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