I am trying to go from 32 bit Vista to 64 bit Windows 7.

The 32 bit Vista was installed by mistake. My system can handle a 64 bit OS. Now I have finally found the time to upgrade. But the 64 bit intallation DVD can't be read from my OS. Any Advice?

Do I need to boot from that DVD drive? Will that work?

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You'll have to boot the 64 bit DVD and clean install.(Backup your files first)

There is no upgrade path from Vista x86 to Win 7 x64. The Clean install is your only option as suggested by scudzilla.

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