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Windows 7: Upgrade from 32bit to 63bit

08 Jun 2011   #1

W7 32bit
Upgrade from 32bit to 63bit

I originally had Vista and bought the W7 "Upgrade" Program that has both the 32bit and 64bit.

Not knowing that my processor ran both 32 and 64bit, I installed the 32Bit. I want to move to 64bit, will do a fresh install, but was wondering if I will have trouble since I am not moving from Vista now, I am going from W7 32 to 64. Will I need to buy a Full Version since I am not "Upgrading from Vista" now? Thanks

My System SpecsSystem Spec
08 Jun 2011   #2

Microsoft Community Contributor Award Recipient

Windows 7 x64

You can do a fresh install with the upgrade version.
Clean Install with a Upgrade Windows 7 Version

The system should actually run better afterwards as well. Generally the purely upgrade installs are a bit slow and buggy in my personal experience.
My System SpecsSystem Spec
08 Jun 2011   #3

W7 32bit

Excellent .... My system, Dell xps420 runs good, but I have 8 gig of Ram that I can install which should also me much better than the 4gb that I currently have.
My System SpecsSystem Spec

08 Jun 2011   #4


Boot the DVD, select Custom install, then drive options to Format the Win7 partition. The DVD should see another OS at boot to allow use of Upgrade version key up front. If not wait until after install to do the quick registry edit given in the tutorial linked by Magnus.
My System SpecsSystem Spec
09 Jun 2011   #5

Microsoft Community Contributor Award Recipient


Make sure you back up your files.

Windows Easy Transfer - Transfer To & From Computers
My System SpecsSystem Spec
09 Jun 2011   #6
Bare Foot Kid
Microsoft MVP

W 7 64-bit Ultimate

Hello paparustyus, welcome to Seven Forums!

It would be best to do a complete wipe of the Hard Disk Drive / Solid State Drive and then start the installation process again, have a look at Step One of the Optimize tutorial below; after you have copied out or made back-ups of the data you need to save to external media, then boot the Windows 7 installation media to do the wipe secure erase to the HDD / SSD and be sure to post back with any further questions you may have and to keep us informed.

Whether you use diskpart to run either the clean all command to completely wipe a HDD / SSD or just the clean command to remove the format configuration data and don't use diskpart to create at least a single partition to do the installation to, letting the Windows installer do the format you will end up with the new Windows 7 System Reserved partition, if you want to make your own decision whether this partition is added, study these two (2) options below.
  • Then if you do not want to create the new Windows 7 "System Reserved" partition use the outline in Step Two #2 to create, format and mark Active a single 100GB partition to do the installation to.
  • If you do want to create the "System Reserved" partition use the outline in Step Two #3 to create, format and mark Active the System Reserved partition and then create and format the 100GB partition to do the installation to.
Either way, running the "clean all" then creating and formatting the partition(s) using diskpart will get you the best possible space to do a clean install of Windows 7 to; you can always extend the Windows partition to include the remaining unallocated space on the HDD / SSD or create additional Primary partitions or an Extended partition after the installation completes if you choose.

SSD / HDD : Optimize for Windows Reinstallation

DISKPART : At PC Startup

Do a Clean Install with a Upgrade Windows 7 Version
My System SpecsSystem Spec

 Upgrade from 32bit to 63bit

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