How to updatiing windows7 to windows10

I suggest that you update to Windows 10. First, backup your personal files to an external drive and save any licence keys you will need to reinstall applications.

Then, do the free upgrade: https://www.zdnet.com/article/heres-how-you-can-still-get-a-free-windows-10-upgrade/

After upgrading, check to see if Windows 10 is activated in Settings | Activation. If it is, then you can perform a clean install of Windows 10 and it should activate automatically. The clean install will result in a better system than just staying with the in-place upgrade.

If you had planned to change to a larger or better drive (such as removing a hard drive and installing a faster SSD), now is the perfect time to do it, as you would clean install to the new drive.

Here are my detailed steps to perform a clean install of Windows 10: https://www.dell.com/community/Let-s-get-Centripetal/When-you-or-another-user-has-to-reinstall-Windows-what-is-your/m-p/8350192/highlight/true#M2

Here's another description of the install process, from a Microsoft MVP:
https://answers.microsoft.com/en-us/windows/forum/all/clean-install-windows-10-11-2023/1c426bdf-79b1-4d42-be93-17378d93e587

https://support.microsoft.com/en-us/windows/upgrade-to-windows-10-faq-cce52341-7943-594e-72ce-e1cf00382445