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You should do a clean install. It is not possible to do an upgrade from a 32 to 64 bit O/S. To do this gather all of your installation files (Adobe Reader, Drivers, Programs) and put them on removable media such as a USB thumb drive or Optical Disc. Then make a complete backup of the system. Use a migration tool to move settings and personal files.

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10y ago

Clean Install

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Q: What type of installation should you perform if you want to install a 64 bit version of windows on a computer that already has a 32 bit os installed?
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