It says days or weeks , any estimate when Microsoft will give me the free copy of Win 10?
If you already reserve your windows 10
You can use Media Creation Tool to download ISO and upgrade you computer
After you upgrade your windows 7 or 8.1 to windows 10 you can do the clean install.
Sorry I am not good at explanation you can read the artist here by @Brink
Windows 10 ISO Download
I have these the left one is the email I got and the right side is da desktop
What do I need to do now?
I would use the media creation tool to get the most recent version of 10 and go from there. The tutorial Brink supplied has all of the instructions.
HTH
Jeff
Do I need to use the product key? that long number you know
No. It will not ask you as you are doing an upgrade. If it does ask you stopas something has gone wrong.
Follow this guide. You are on step 4 at the moment. Next is step 10. Windows 10 - Upgrade Installation - Windows 10 blog