One of the trending topics for WargaNet, especially computer and laptop users, is the release of the latest version of Windows, namely Windows 11, which leaked before the official release schedule by Microsoft. As soon as I got info about Windows 11, I immediately hunted for the download link and Alhamdulillah, finally I was able to taste the appearance of Windows 10 on my computer. 
Guide How to Upgrade Windows 10 to Windows 11 Without Losing Data Files and Applications
Here are the steps on how to upgrade Windows 10 to Windows 11 Computers and Laptops without Losing Files and Applications, so you don't need to be afraid of data files or applications on your previous computer or laptop being lost. This way you also don't need to reinstall Windows, so this method is the quickest and most practical way to switch to Windows 11.
Run the Windows 11 Setup Installer from File ISO Windows 11 or it could be from Master Bootable Windows 11 Flasdisk.
Checklist I Wanto to Help Make the Installation better Privacy Statement, then click Next
Wait for the Windows Checking System process that has been installed on your previous computer or laptop. When it appears Error The PC Must Support TPM 2.0 To fix this, you need to slightly modify the Windows 11 ISO. I have discussed the method in a previous post entitled: How to Make a Bootable Installer Windows 11 Flashdisk.
Applicable Notices and License Terms window appears, Click Accept
Windows 11 is Ready To Install, but before pressing the Next button, make sure to check the Want to Keep option and make sure the option is Keep Personal Files and Apps so that data files and applications on your previous computer or laptop are not deleted.
After everything is ready, click Next to Upgrade Install Windows 11
The next step is to wait for the upgrade process to complete by itself. For the process of upgrading Windows 10 to Windows 11, the time it takes is approximately 45 - 60 minutes.
That's the Tutorial Guide How to Safely and Easily Upgrade Windows 10 to Windows Computers and Laptops without Losing Files and previous Applications that you can try to practice.