Please give me my product key

[Indrasolanki]

Hp r007tx

CND43478CP

[Lil_Boy_Blue]

Hi

Please don't post the serial number.

KeyFinderInstaller may help....
https://www.magicaljellybean.com/keyfinder/

Doing research, and none of the methods are mine, I have some, simple single lines of code that will list the same value for your Windows Product Key…

Using cmd.exe as an Administrator (copy and paste accordingly).
wmic path softwarelicensingservice get OA3xOriginalProductKey >> c:\ProdKey.txt
Creates a text file called ProdKey.txt on your C:\ area.

Next is a PowerShell command, as Administrator...
(Get-WmiObject -query ‘select * from SoftwareLicensingService’).OA3xOriginalProductKey

but it will run using cmd.exe as an Administrator.
powershell (Get-WmiObject -query ‘select * from SoftwareLicensingService’).OA3xOriginalProductKey

https://www.microsoft.com/en-us/software-download/windows8ISO

[Lil_Boy_Blue]

This First part only works when a valid Recovery Partition is enabled.

If it displays an error message then move onto the Second part,
OR if you have data you wish to try and save using the XCOPY command.
Then create your own Repair/Recovery/Rebuild/Re-install media or buy a set from HP.

Turn off the computer.

Disconnect all connected devices and cables, Media Drives, USB drives, printers, & faxes.
Remove media from internal drives, and remove any recently added internal hardware.
Do not disconnect the monitor, keyboard, mouse, or power cord.

Turn on the computer and repeatedly press the F11 key, about once every second,
until the Choose an option screen is displayed, and then continue.

On the Choose an Option screen, click Troubleshoot, and work your way through the screens.

Second Part:-
This may require another PC. Find and Download your .iso from…
W8.x and W10 should activate automagically from their embedded licence key.

https://www.microsoft.com/en-us/software-download/windows8ISO

Expand/Extract/Burn the iso Image onto a DVD/USB as needed.
Microsoft’s Creator Tool will make the required DVD or USB.

Even though it has NO actual HP software/drivers included, you may be able to
XCOPY the C:\Users\* area onto a ‘large’ USB stick, via the Command Prompt.

You’ll need to try various drive letters; D:..-..Z: until it’s matched - could be G; mine’s S:

C:\>XCOPY C:\Users\* S:\ /e /i /h (then files like those 3 listed below get copied over)

C:\Users\desktop.ini
C:\Users\All Users\agent.1509128044.bdinstall.bin
C:\Users\All Users\HP Deskjet 2540 series\Help\flash\zoom.swf

Then you can try System Recovery Options / Advanced Options shown in the screenshots.
Begin with the Automatic Repair, then Startup Settings etc.

From either the C:\ or the X:\ prompt try the following