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How to perform a clean Windows 10 installation

Doing computer repair for a living, I see quite a few computers that could really benefit from a clean, fresh installation of Windows 10. Usually it is a system that was upgraded to Windows 10 from Windows 7 or Windows 8.1.

How to perform a clean Windows 10 installation

Then of course there are times that the registry has gotten corrupted or the hard drive has failed. But whatever the case, a clean, fresh installation of Windows 10 is always a great way to get your computer back to tip-top shape.

Now you might be thinking that just performing a reset of Windows 10 would work perfectly fine. And in most cases, you would be right. But if your computer originally came with Windows 7 or Windows 8.1, you could have problems. Let me explain.

When you bought your computer new, it came with a hidden recovery partition that had all of the installation files for your version of Windows. If that version was Windows 7 or Windows 8.1, the files got replaced when you upgraded to Windows 10.

The recovery media issue with upgrading to Windows 10
The recovery media issue with upgrading to Windows 10

But the problem that I have encountered is the upgraded recovery partition sometimes doesn't work. So, when you try and reset Windows 10, it fails. A clean installation of Windows 10 fixes that issue. And with a clean, fresh Windows 10 installation, you will know that everything will work as it should.

The only down-side to a clean Windows 10 installation is the fact that you have to reinstall all of the programs you personally installed. But if your system will not boot, then it is kind of a moot point. You would have to reinstall them anyway.

Backup and inventory

So, the first thing to do is backup your computer. You will need an external drive that is fairly large (I use 1GB and 2GB drives myself) and a blank CD/DVD (system repair disk). Here's how to use Windows Backup that is included inside of Windows 10.

Backup your files with File History and Windows Backup in Windows 10

Second thing to do is to take inventory of the hardware and software inside of your computer. Use a program like Belarc Advisor to create a list of hardware and software in your computer.

Make sure you print a copy of the results. You can also save a copy to an external drive if you like. But a printed copy will work the best, as you can check off items that you take of after the reinstallation of Windows 10.

Create the Windows 10 installation media

This step is fairly easy. All you have to do is download the Windows 10 media creation tool. It is a stand-alone program that does not require installation to run. Just double-click on the program and you are ready to start.

Windows 10 Media Creation Tool options
Windows 10 Media Creation Tool options

You will need either a blank DVD or 8GB USB drive to create the bootable installation media. If you run the media creation tool on the same computer as you are going to reinstall Windows 10 on, it will automatically select the recommenced options.

Clearing the hard drive

Now comes the time to wipe the drive, or at least the partition where Windows 10 is installed. If you have a Dell or HP computer, they have diagnostic partitions, so you may just want to wipe just the OS partition only.

Keep in mind that if you upgraded from Windows 7 or Windows 8.1, the recovery partition that came with your computer to restore factory settings no longer functions. Sometimes it might be better to just wipe the whole drive clean and be done with it. But that is completely up to you.

I personally like to use the disk wiping tools included on the Ultimate Boot CD (UBCD). All you have to do is download the most current ISO image and burn it to a CD. You can also create a bootable USB drive too. The instructions are on the UBCD website.

Now to boot up your computer up on the UBCD may take a little work, since it is built on a version of Linux. If your computer has Unified Extensible Firmware Interface (UEFI) enabled, you will have to go into the BIOS and disable it temporarily.

Installing Windows 10

Now that your drive is wiped clean, it is time to install Windows 10. If you are using a DVD, turn your computer on, eject the DVD tray, insert the Windows 10 DVD you created and then restart your computer. If your using a USB drive, just plug it in and start your computer.

Since there is no operating system, your computer will search all available media for a boot record. Once it finds the Windows 10 media, the installation will begin.

During the installation of Windows 10 you will be prompted for your product key. Windows 10 is a little different from previous versions of Windows, in that the product key is not stored on your computer, but on the cloud. Microsoft calls it Digital Entitlement.

With Digital Entitlement, you do not need to enter your product key during installation. Just click on the I don't have a product key link on the bottom of the screen. Once the installation is complete, Windows will automatically activate the first time your system can get online.

From here all you have to do is install the programs and features you want. Then sit back and enjoy your clean, fresh Windows 10 installation.

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Geeks in Phoenix is an IT consulting company specializing in all aspects of Computer Repair / PC Repair / Laptop Repair. Since 2008, our expert computer repair technicians have been providing outstanding Computer Repair, Virus Removal, Data Recovery, Photo Manipulation and Website Support.

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