Originally Posted by
saturn5
I have seen on ebay Windows 10 on USB with a license
Do NOT buy this. You don't need it. It is a red herring and a waste of money.
Having upgraded from W7 to W10 it is most likely that there is what Microsoft call a digital entitlement (which is effectively a kind of key stored at Microsoft) so you probably don't need to worry about a new licence or product key.
(N.B. If the new Windows 10 doesn't pick up the digital entitlement and thus automatically activate itself then the next step would be to reinstall Windows 7 and do the upgrade to W10 again, but cross that bridge if you get to it).
This just leaves installing a new Windows 10. See below.
Originally Posted by
saturn5
It does offer to boot from a USB in the bios.
Then you're sorted. Use another PC to go here, https://www.microsoft.com/en-gb/soft...load/windows10 (this is Microsoft's official Windows 10 download site), and download the 'Media Creation Tool' (available via the 'Download tool now' link). Run this tool on your other PC and it will download all that you need to do a fresh install on the laptop and it will write it all to a USB stick.
Read the notes on the web page for full information. It's quite useful info.
The tool lets you choose 32 or 64 bits as well as ISO or USB. Obviously you need the USB installer if you're going to use a USB memory stick to do the installation on the laptop.
Note that a fresh install of Windows 10 from a USB stick will probably destroy any existing data on the laptop so make sure you have external copies of everything you need before you start the installation on the laptop.
As for figuring out if you need 32 or 64 bit, look at the specs of the laptop and let us know the exact CPU spec here. We can tell if you you need 32 or 64 bit.