Can I boot for any win dvd when not my orig as can't find it

[DG5154]

HP Pavilion 15-p293na, Notebook PC

lost recovery drive,

Cant find the win 8 dvd (think not proveded) or serial key

Where would the serial key be?

Have a windows disk from a previous laptop (broken) can I use this disk.  Could I use the one with the pc I'm using now to get it up and running? 

Thanks

[Paul_Tikkanen]

Hi:

The W8.1 product key is in the BIOS.

You posted that you are running W10 on there.

You can reinstall W10 for free as follows...

You can make a W10 USB flash drive installer with the Microsoft Media Creation Tool, using an 8 GB flash drive using another Windows PC, if your PC is not working.

https://www.microsoft.com/en-us/software-download/windows10

If you are asked to enter a product key during the installation process, select the 'I don't have a product key' option, and W10 will install and automatically activate once you are connected to the internet.

Here are the steps to create the W10 USB flash drive installer...

Select Download tool now, and select Run.

If you agree to the license terms, select Accept.

On the What do you want to do? page, select Create installation media for another PC, and then select Next.

Select the language, edition, and architecture (64-bit or 32-bit) for Windows 10. You want 64 bit.

Select which media you want to use:

USB flash drive. Plug in a blank USB flash drive with at least 8GB of space. Any content on the flash drive will be deleted.

Then you can reinstall the drivers and available software from the PC's support page.

If you need or want to reinstall W8.1, let me know, and I will give you the instructions to reinstall W8.1 for free.