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Windows 7: W7 Home Premium 64bit used in W7 Home Premium 32 bit. Can?

17 Mar 2011   #1

Windows 7 & XP
W7 Home Premium 64bit used in W7 Home Premium 32 bit. Can?

Hi, I bought a notebook preinstalled Windows 7 Home Premium 64 bit, of course, licensed.

But I found it incompatible with some software. So I decided to use 32 bit.

I want to format the whole drive and install 32 bit version of W7HP.

Can the product key of W7HP 64 bit be used to activate W7HP 32 bit in the same computer?

My System SpecsSystem Spec
17 Mar 2011   #2


Yes. You are entitled under the EULA to either 32- or 64-bit Win7 with each license.

Here are tips for getting a purrfect clean reinstall of factory OEM: re-install windows 7
My System SpecsSystem Spec
18 Mar 2011   #3
Bare Foot Kid
Microsoft MVP

W 7 64-bit Ultimate


It would be best to do a complete wipe of the entire Hard Disk Drive for a fresh start, have a look at the information below and be sure to post back with any further questions you may have and to keep us informed.

After you have copied out or made back-ups of the data you need to save to external media, use Step One of this tutorial at the link below to do a wipe (secure erase) to the entire Hard Disk Drive / Solid State Drive.
  • 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

18 Mar 2011   #4

Microsoft Community Contributor Award Recipient


Check & download the upto date drivers from the manufacturer's web site.
Some manufacturer's are shipping out the 32 bit DVD with PC, check the box.
My System SpecsSystem Spec

 W7 Home Premium 64bit used in W7 Home Premium 32 bit. Can?

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