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Windows 7: Windows 7 64 over Windows 7 32

25 Jan 2010   #1

Windows 7 Home Premium
Windows 7 64 over Windows 7 32

I installed Windows 7 Home Premium 32 bit because my Vista was 32 bit. I have 4 GB of Ram and would like to install the 64 bit version. Can I simply insert the disc and reinstall the 64 bit version over the 32 bit one?

My System SpecsSystem Spec
25 Jan 2010   #2

Windows 7 Pro X64 SP1

32-bit and 64-bit Windows: frequently asked questions

The short version: 64 bit Windows cannot be installed as an iupgrade-in-place over a 32 bit version. You can only do a custom (clean) install. It required booting from the installation DVD; you can't lauch the 64 bit DVD from within a 32 bit OS.
My System SpecsSystem Spec
25 Jan 2010   #3
Microsoft MVP


Clean Install Windows 7

If you have an Upgrade version, it will see the prior OS when DVD boots up to allow use of Upgrade key. Use the Custom>Drive Tools to format before installing.
My System SpecsSystem Spec


 Windows 7 64 over Windows 7 32

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