Windows 10: Can I just use one USB to install new windows with product key?

I installed my PC with a free Windows 10 Trial, but I’d like to purchase a product key. Do I need another new USB or can I use the same one that installed the free version. I’m not sure if I’ll be kicked out from the software for erasing the data of the original USB containing the trail.

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:)

 

windows xp installation and dual core am

could someone please list the steps they follow to install windows with a dual core processor and windows xp service pack to. I'm reletively new to amd dual core and i feel i'm missing a step. All help will be appreciated. thanx

 

Installing windows off of a USB stick

Step By Step from vista:
From admin cmd prompt

1. diskpart
1a. list disk
2. select disk 1 (replace 1 with your usb drive)
3. clean
4. create partition primary
5. select partition 1 (replace 1 with your usb drive)
6. active
7. format fs=fat32
8. assign
9. exit

Copy Windows Vista's DVD ROM content to the Flash Drive

xcopy d:\*.* /s/e/f e:\ (d being your vista cd and e being your usb stick)

And that's it, boot off your usb disk

 

Installing Windows 7 via USB flash drive!

Yeah great guide worked for me, I need to install Win 7 on a new build that I'm doing for someone, will be just my luck the mobo won't let me boot from USB *Roll Eyes

Yeah some of the installation steps are done in just a second, I was intalling it left the room for 10 minutes came back to check on it to find it at the start screen lol, it installed and rebooted back to the USB, wasn't expecting it to be done so fast.