Error Code: 0x80070002 led to my inadvertently resetting the drive letter of the system drive. Now the system will not reboot.

Talk about stepping into it! While deleting some files for space, I inadvertently deleted or uninstalled something that when I rebooted, I received the following message:

A problem is preventing Windows from accurately checking the license for this computer. Error code: 0x80070002.

I went to Microsoft.com for help. The first workaround did not apply as there was no "Cryptography" folder at the named location in my registry. I inadvertently tried the 2nd option (Reset the drive letter of the system drive). I changed "C" to "D" and "D" to "C". Now, my system will not reboot.

When I attempt to get to safe mode, I am unable to get to the logon screens. I am only able to get to the Recovery Console screen (which looks and acts as a "DOS" prompt; however, I am not sure what to enter to attempt to recover my system.

I do not want to reload Windows as I still have data that I wish to not lose. (Yes, I wish I had spent the $50 to back up my PC. . . ) Can anybody "safely" help me?

Thank you for taking the time to read my post.