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How To Clean Install Windows 7
Most of the time, a Windows 7 clean install means to remove an existing operating system (like Windows XP, Linux, Windows 7, Windows 10, Windows 8, ... it doesn't matter) and replace it with a fresh or "clean" installation of Windows 7.
In other words, it's the "erase everything and start from scratch" process for Windows 7, a procedure referred to as a "clean install" or sometimes as a "custom install." It's the ultimate "reinstall Windows 7" process.
A clean install is often the best way to solve very serious Windows 7 problems, like a virus infection you can't get rid of completely or maybe some kind of Windows issues that you can't seem to solve with normal troubleshooting.
Performing a clean install of Windows 7 is usually a better idea than upgrading from an older version of Windows as well. Since a clean install is a true start over from scratch, you don't risk inheriting any buggy situations from your previous installation.
To be 100% clear, this is the right procedure to follow if:
you want to erase whatever you have have and install Windows 7
you want to reinstall Windows 7
you want to install windows 7 on a new hard drive
This guide is broken into a total of 34 steps and will walk you through every part of the Windows 7 clean install process. Let's get started...
Backup & Locate Your Product Key
The most important thing to realize before performing a clean install of Windows 7 is that all of the information on the drive that your current operating system is installed on (probably your C: drive) will be destroyed during this process. That means that if there's anything you want to keep you should back it up to a disc or another driveprior to beginning this process.
You should also locate the Windows 7 product key, a 25-digit alphanumeric code unique to your copy of Windows 7. If you can't locate it, there is a fairly easy way tofind the Windows 7 product key code from your existing Windows 7 installation, but this must be done before you reinstall Windows 7.
Note: If Windows originally came preinstalled on your computer (i.e. you did not install it yourself), your product key is probably located on a sticker attached to the side, back, or bottom of your computer's case. This is the product key you should use when installing Windows 7.
Start the Windows 7 Clean Install Process
When you're absolutely sure sure that everything from your computer that you want to keep is backed up, proceed to the next step. Keep in mind that once you delete all of the information from this drive (as we'll do in a future step), the action is not reversible!
Note: The steps and screen shots shown in these 34 steps refer specifically to Windows 7 Ultimate edition but will also serve perfectly well as a guide to reinstalling any Windows 7 edition you may have including Windows 7 Professional or Windows 7 Home Premium.
Minimum hardware requirements for Windows 7
|Component||Operating system architecture|
|Processor||1 GHz IA-32 processor||1 GHz x86-64 processor|
|Memory (RAM)||1 GB||2 GB|
|Graphics card||DirectX 9 graphics processor with WDDM driver model 1.0|
|Free hard drive space||16 GB||20 GB|
|Optical drive||DVD-ROM drive (Only to install from DVD-ROM media)|
Additional requirements to use certain features:
Windows XP Mode (Professional, Ultimate and Enterprise): Requires an additional 1 GB of RAM and additional 15 GB of available hard disk space. The requirement for a processor capable of hardware virtualization has been lifted.
Windows Media Center (included in Home Premium, Professional, Ultimate and Enterprise), requires a TV tuner to receive and record TV.
Your graphics card needs to support DirectX 9 if you plan to utilize Aero. Also, if you intend on installing Window 7 using DVD media, your optical drive will need to support DVD discs.
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