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How do I install windows 10 without harming my windows 7?


I only have ONE computer...a desktop...yes, it will run windows 10. I want to play around with Windows 10 before giving up Windows 7. Here's what I want to do:

Install two newly formatted hard drives (500 gb)
Place Windows 10 on the new hard drives
Keep my current Windows 7 just as it is
Keep Windows 10 & 7 separate from one another so that one installation will not contaminate the other.

Thanks for your thoughtful solutions!

Or you can dual boot

Personally I'd recommend installing W10 on a separate drive, obviously though you'd have to buy a copy of Windows 10 if you're not upgrading your copy of W7. If you do go this route be sure to unplug all other drives whil installing W10.

Did you buy Windows 10 on sale? How much did you pay?

Here's what I suggest you to do:
  1. From Windows 7, download & Install Macrium Reflect Free. Connect one of your new 500GB HD and clone your current Windows 7 to it. Follow step 1,2,3 from the screen shot:



  1. Disconnect your current Windows 7 then boot up with the new cloned copy of Windows 7
  2. Upgrade it to Windows 10 so it will be fully activated.
  3. If you decide to keep Windows 10 then do a fresh install of Windows 10. If not, disconnect the 500GB HD containing Windows 10 then re-connect your Windows 7
  4. You are back to where it was before.

Option 1: Download VMware player (free) and find an ISO and install windows 10 that way. You can play with it inside of the virtual environment, decided if you like it or not, then delete the VM and install Windows 10 or keep Windows 7 based on your decision.

Option 2: Just upgrade to Windows 10 ( you will probably like it) and if you do not like it, you have 30 days to go back to Windows 7 after you upgrade. Windows will allow you to do that, it is built in.

Very well thought out solutions...kudos to you all! All direct and to the point. Thanks

Option 2: Just upgrade to Windows 10 ( you will probably like it) and if you do not like it, you have 30 days to go back to Windows 7 after you upgrade. Windows will allow you to do that, it is built in.
Several people have had failures when attempting to go back to their previous OS. I would not rely upon rollback, but make an image before upgrading with Macrium Reflect.

Several people have had failures when attempting to go back to their previous OS. I would not rely upon rollback, but make an image before upgrading with Macrium Reflect.
Worried me a bit, too.RJ's suggestion of a virtual machine sounded good so I'm working with that for the time being. Thanks Commander...Navy guy myself

How do I install windows 10 without harming my windows 7?