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#51
Why would you inactivate the Recovery partition which was booting Win7? Who told you to do that? No one would have advised that as it is reckless. I am wary to continue helping in such a case.
Mark Recovery Partition Active then run Startup Repair - Run up to 3 Separate Times to see if it will start. If so go back to the plan to copy your data over to a new data partition you create Logical using Partition Wizard Create Partition - Video Help. If not install Win7 to a partition you create during install in the Unallocated Space. Do not do anything other than these choices.
If the Dell Disk says Win7 Reinstallation DVD and clearly has SP1 then you can use it, otherwise use the latest official installer provided for your licensed version in Step 1, burned to DVD or written to bootable flash stick with tool in Step 2 of Clean Reinstall - Factory OEM Windows 7.
There is no evidence in the Disk Mgmt screenshot that you have a EFI install which shows a normal MBR HP factory preinstall. Did you change settings in your BIOS to enable UEFI from Legacy BIOS? If so change them back as that may be why it's not booting. You want a normal install which should have no UEFI choices when booting the installer. If in doubt post back camera snaps of the BIOS choices related to UEFI, CSM (Compability Support Module) or Legacy BIOS. You want UEFI disabled, CSM and Legacy BIOS enabled.