Chosen Solution

I bought an asus s500ca without a hard drive I’m hoping to use a usb boot I downloaded from Microsoft and I was wondering if when I boot it up with this usb will I need to enter a new product key?

What operating system originally came with this laptop? Both Windows 10 and 8 in later models had keys embedded in the motherboard. When you install, it will self activate with those keys.

It should let you skip applying a serial code. It will notify you continuously though. There are some sites that give out codes (cant post here). Be wary on such sites as many are a bit sketchy