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Remove previous Windows installations entirely

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June 17, 2014 12:14:22 PM

Hello, some time ago I decided to try windows 8 which was the worst decision of my life. So now I have windows 7 back on my machine but there are now issues... I think that installing windows 8 then installing windows 7 over 8 messed some things up.
For instance if I wanted to use the "Windows boot Updater" (here)
But when I do I get an error like this, it is even posted on that page. So I plan on re-installing windows 7 soon (Not because of this issue but because of a greater one) And I want to know how to completely remove Windows 7/8 pretty much everything like windows was never even on it. Not even a trace of the previous installation. Like the drive hasn't even had windows on it yet. As if its factory reset.
So is there a program that I could use to wipe the drive down to the last file? Maybe something I could boot off of from a USB stick to wipe it?
I can plug my drive into another PC and wipe it from there, but I am pretty sure that just reformatting isn't enough and that it still leaves something the Windows 7 installer can read.

Best solution

a c 799 G Storage
a c 392 * Windows 8
a c 540 $ Windows 7
June 17, 2014 12:21:34 PM

Boot from your install media, either USB or DVD
During the install, go to Advanced. Select each partition - Delete
You are then left with one large unallocated space.
Let Windows use that, creating what it needs.
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a c 83 G Storage
a b * Windows 8
a b $ Windows 7
June 17, 2014 12:24:07 PM

^^+1 Delete all the partitions during install, and install to the empty space on the drive.
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June 17, 2014 12:48:45 PM

USAFRet said:
Boot from your install media, either USB or DVD
During the install, go to Advanced. Select each partition - Delete
You are then left with one large unallocated space.
Let Windows use that, creating what it needs.


Sounds simple enough...
Thank you!
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June 17, 2014 2:32:21 PM


Tried this on my laptop, It worked!
Laptop had windows 8 on it, put seven on it. ANd the boot changer worked!
Guess when I installed Windows 7 on my PC I formatted the partitions instead of deleting them :pfff: 
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