Windows 10 preview - install on separate partition?

I'm quite computer savvy so know my way round a Windows installer. Can I use the ISO to install the Windows 10 Tech Preview onto a separate partition and dual-boot with my existing Windows 7 (SP1) install (assuming I burn it to DVD first) ? 

 

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Last updated May 23, 2018 Views 4,472 Applies to:

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If nobody replies to this by this evening I intend to try this out after work.

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Rather than use a partition, why don't you install it on a VHD. It will look and act like it is installed on a partition but if you want to blow it away all you have to do is delete the VHD. No need to play with partitions if you don't want to.

here is one example of how to do it - http://henkhoogendoorn.blogspot.com/2011/09/guide-to-install-windows-8-on-vhd.html

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I just finished setting up a Multiboot with Windows 8.1. You should be able to with Windows 7 as well. I created a separate partition on my SSD boot drive for Win10. Then I downloaded the ISO for Win10. I used the Windows 7 DVD/USB Boot Tool (http://download.cnet.com/Windows-7-USB-DVD-Download-Tool/3000-18513_4-10972600.html) to extract the ISO onto my 16GB USB (must be 4GB+). After the USB Tool finished creating my boot drive, I restarted my computer. VERY IMPORTANT. DO NOT SIMPLY RUN SETUP SINCE IT WILL OVERWRITE YOUR CURRENT OS. I NEARLY DID THIS BEFORE I REALIZED SOMETHING FISHY WAS GOING ON. You must restart and boot into the USB drive. Then you will be given the regular Windows installer window. Choose where to install and accept all the agreements and such. You will then be presented with a VERY nice Multiboot GUI screen to select what version to boot into.

Again, this is working fine for me with Windows 8.1 and Windows 10 TP. Windows 7 should be absolutely no different since you are installing a newer version of Windows. If you were trying to install an older version (say Vista or XP), it would be a different story.

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I plan on doing this as well after work, however I always come across issues.

Shrinking a drive is a pain in Windows Vista and newer. because of the issue with "unmovable files" 
......
Love how i got 250GB free space but can only shrink... 6GB......
*sigh* yes there's ways around it... just hate how windows can't do it using disk management
(BTW yes, i've done disk cleanup and defrag and reboot and even cmd defrag commands and only increased it to ~20GB... where's my other 230GB?)

However i'm doing this on my surface pro 2, so I'm going to write the ISO to a flash drive and install it that way on a separate partition instead of DVD. 

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Just run Hyper-V and install it on a Virtual Machine instead. Much easier. It took about 30 minutes start to finish to get up and running on the 10 Tech preview that way.

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Agreed, I would say use Hyper-V or Oracle Virtual Box, which is what I'm using right now with no issues.

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Question: That nice multiboot GUI screen, does that just replace the previous bootloader? I currently have a dual boot with Win7 and Ubuntu, and tomorrow I plan to install the preview.  Will the Grub loader installed by Ubuntu simply be replaced by the pretty new windows Multiboot GUI? Any thoughts on whether it'll have issues with the Ubuntu install?

I suppose I can just be the Guinea pig for this tomorrow, though...

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Assuming your current OS and the Windows version you want to install share the same architecture (32-bits/64-bits) you can just run the executable "setup.exe" from the "sources" folder within the ISO.

It will allow you to make a custom installation.

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I recommend just using a spare drive... messing with partitions, especial on an SSD is a little iffy.

thanks, EK

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I have DVD drive pointing to .iso file extension, looks like it is correct, but it is not picking up

Can u provide step by step instruction to install via hyperV.  Thanks!

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