Hello Williford62 and welcome to Seven Forums.
Just so I have a better understanding of everything that went on prior to connecting your desktop to wi-fi . . . How was the desktop originally set up for your internet connection? Did you try going back to that configuration and eliminate the wi-fi?
With your computer in its original internet configuration (no wi-fi connections at all) can you access Safe Mode
through the Advanced Boot Options menu? If yes, do you have a restore point going back to before you hooked up the wi-fi? If yes, you might be able to undo everything the wi-fi experiment did. If no, you could try running the Startup Repair
. It might have to be run 3 separate times, rebooting in between each run.
Manually turning off the power could have damaged or corrupted other system files. You could try running a System File Checker scan from an elevated command prompt
or if you can't access that try running it from a command prompt at boot
You may also find some suggestions in these tutorials prepared by one of our Forum experts. The first is general troubleshooting suggestions and the second is specifically for failure to start problems. Troubleshooting Steps for Windows 7 Troubleshooting Windows 7 Failure to Boot