Instructions for each are as follows

In-Place Upgrade: 

1. 
   Download the appropriate ISO for your Windows installation
   
   • 
     Save it to a location on your PC
     
2. 
   Open File Explorer, navigate to the save location for the ISO, and double-click the ISO file to open it.
   
   • 
     Windows will “mount” the image so you may access the files contained therein.
     
3. 
   Double-click the Setup.exe file to launch the install process
   
   • 
     NOTE: During setup, ensure you select the option to “Keep Windows settings, personal files, and apps”.
     
4. 
   Once the install has completed, verify your Windows Insider settings are correct.
   
   • 
     Windows 10 - Settings > Update & Security > Windows Insider Program
     
   • 
     Windows 11 - Settings > Windows Update > Windows Insider Program
     

1. 
   Download the appropriate ISO for your Windows installation 
   
   • 
     Save it to a location on your PC
     
   • 
     If you want to create a bootable usb, see these additional steps
     
2. 
   Open File Explorer, navigate to the save location for the ISO, and double-click the ISO file to open it.
   
   • 
     Windows will “mount” the image so you may access the files contained therein.
     
3. 
   Double-click the Setup.exe file to launch the install process
   
   • 
     NOTE: During setup, click the “change what to keep” option.
     
   • 
     On the following screen, click “nothing” so you may complete a clean install.
     
4. 
   Once the install has completed, verify your Windows Insider settings are correct.
   
   • 
     Windows 10 - Settings > Update & Security > Windows Insider Program
     
   • 
     Windows 11 - Settings > Windows Update > Windows Insider Program
     

• 
  Remember, trying out an early build like this can be risky. That's why we recommend that you don't install the preview on your primary home or business PC. Unexpected PC crashes could damage or even delete your files, so you should back up everything.
  
• 
  If you want to stop using Windows Insider Preview and return to your previous version of Windows, you'll need to reinstall your previous version from the recovery or installation media that came with your PC—typically a DVD. If you don't have recovery media, you might be able to create recovery media from a recovery partition on your PC using software provided by your PC manufacturer. You'll need to do this before you upgrade. Check the support section of your PC manufacturer's website for more info.
  
• 
  If you use the ISO to do a clean install of the Windows Insider Preview, you won’t be able to use the recovery partition on your PC to go back to your previous version of Windows. 
  
• 
  After you install this new build from the ISO, it’s important to verify your Windows Insider Preview settings are correct to continue receiving additional preview builds from your selected flight ring.