Computer fix
1. Repeatedly press the F11 key until "Windows is loading files..." displays on the screen.
support.hp.com/ca-en/document/…
This will start recovery to its initial state.
2. You can't install a vanilla version of Windows on your computer. License Activation will probably fail.
Because:
OEM SLP: This key comes pre-installed in Windows, when it comes from the Factory. This key is geared to work with the special instructions found only on that Manufacturer's computer hardware. So when Windows was installed using the OEM SLP key (at the factory) Windows 7 looks at the motherboard and sees the special instructions and Self-Activates. (that's why you did not need to Activate your computer after you brought it home)
COA SLP: This is the Product key that you see on the sticker on the side (or bottom,[ or inside the battery compartment]) of your computer. It is a valid product key, but should only be used in limited situations (such as if the OEM SLP key stops self-activating for whatever reason). The key must be activated by Phone. (Note: All manufacturers that use the OEM SLP system are required by contract to include a Certificate of Authenticity (COA) sticker, that has a COA SLP key, on the computer)
answers.microsoft.com/en-us/wi…
What is your current Windows?
The thing is you don't really need the HP disk or whatever... If you have an OEM Windows license (and I am sure you do)