Firstly, note that the free upgrade from Windows 7 to Windows 10 officially ended July 29, 2016. However, Microsoft continued to allow such upgrades (the so called loophole) through Sept 20, 2023. Since that date there is no free upgrade path.
To upgrade now you would have to purchase the newer version. It is very difficult to find a legitimate copy of Windows 10 which has not been sold by Microsoft since Jan 31, 2023 and is no longer supported in any case.
If, nonetheless, you intend to pursue this you can find system requirements for Windows 10 here -
Windows 10 system requirements
Installation media can be obtained here
https://www.microsoft.com/en-us/software-download/windows10
Disregard the incorrect information in the Q&A assist post. You cannot upgrade by Windows update.