Question Trying to Dual Boot Win 7pro and Win 10 pro

Speedhands

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Sep 19, 2014
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I have a Samsung 850 SSD with 512 GB. I have 210 GB's free. I'm using Windows 7 disk management to shrink the drive but it will only allow me to shrink it to 40260 MB. I'm completely confused as what to do. I wanted to split the drive in half and have one side for Win 10 and the other for 7. Any help would be greatly appreciated.
 

Speedhands

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Sep 19, 2014
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The best way to do a dual boot is with two individual physical drives.

One the same drive...the eldest Windows needs to be installed first.

The other quetion is....why the dual? Why Win 7?
Because I have Win7 pro now and not all my programs I need for work , will work on Win10 currently.

I already Win 7pro installed, I'm trying to install Win 10 pro. It won't let me partition more than 40 GB's out of the 210 GB I have free and I don't know why.
 

USAFRet

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Mar 16, 2013
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Because I have Win7 pro now and not all my programs I need for work , will work on Win10 currently.

I already Win 7pro installed, I'm trying to install Win 10 pro. It won't let me partition more than 40 GB's out of the 210 GB I have free and I don't know why.
This is on an HDD?

Please show us a screencap of your Disk Management window.
 
I already Win 7pro installed, I'm trying to install Win 10 pro. It won't let me partition more than 40 GB's out of the 210 GB I have free and I don't know why.
First off, 40Gb is plenty enough for the OS as long as you install any programs to a different drive.

Second you will have to defrag your drive with a defragger that will allow you to move all the data to the front of the drive, drive manager only allows you to create partitions as large as the free space, so if you have random files up to 40Gb before the end of the drive then 40Gb is the most you will get.

Third if you want to save yourself a lot of hassle and danger of losing all your data and/or partition setup, yust create a virtual hard disk from within windows 7 disk management and install windows 10 on that and add it to the boot menu.It's called windows to go if you want to look up a guide.
 

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