Windows 10 cheap?

[marco.da.man]

What are the chances that my win7 key still works after upgrading to 10?

Is it win 10 a new computer if is no it won’t, if you’ve upgraded win 7 to 10 through the links then it should auto be done.
Otherwise reinstall win 7 with your key and do free upgrade still. If not you need buy a win 10

 

[AHarvey]

12 year old laptop won't even run Win 10 at a level that won't make you throw it out of a window.

As already mentioned, put Linux on it, either a lightweight version or the general Ubuntu.

It has a graphical user interface like Windows, web browsers, email, and Libre Office (MS Office).

 

[AHarvey]

Is it win 10 a new computer if is no it won’t, if you’ve upgraded win 7 to 10 through the links then it should auto be done.
Otherwise reinstall win 7 with your key and do free upgrade still. If not you need buy a win 10

As soon as Windows 7 is on there you don't need to buy win 10. To start, he'd be better just using Win 7 on a 12 year old laptop, secondly, if you use the Windows 10 accessibility upgrade it's still free