HP Pavilion 20 all in one won't start.

[TheUniverse001]

The issue started when out of nowhere my computer had a pop up that said automatic repair and it would take FOREVER but then when it was doing it, the dog had ran into the power cord and it came out of the wall outlet so after that I tried to turn it back on but it would be stuck on the automatic repair screen for hours just to tell me the automatic repair failed. I've tried the advanced options to try and factory reset but the computer won't reset and it will say after about an hour of trying to auto repair it brings me back to the "Automatic Repair couldn't repair your PC" what should I do?  

[WAWood]

@TheUniverse001 

Sorry, but I don't have good news for you.  When Windows Updates are running, there is a notice on the PC to NOT turn off the PC -- and that is because doing that leaves the OS in a corrupted state so the PC no longer boots into it, and it will not longer run.

There is no simple way to insert a USB stick or DVD and repair that, nor is there a built-in function that will do it, either.

You basically have to reinstall Windows from scratch -- and the problem you will have is that no one provided Win8 install media anymore and HP might not stock it.

HP Recovery Media is a set of DVDs and a CD, or USB stick, that will erase the hard drive (removing all data, settings, and applications, reinstall the original OS, drivers, and some HP Utilities.

In some cases, you may be able to order a USB stick instead of disks. You have to order these from HP; they can not be downloaded.

You can look online for Recovery Media starting with the linked paged: http://support.hp.com/us-en/drivers

Once there, input your Product name or number. On your Software and Drivers Download page, select your Operating System and and Version. Click "Update".

If HP Recovery Media is available for your machine, down near the bottom of the page, you will see an entry for Order Recovery Media-CD/DVD/USB. Click the "+" symbol to expand that entry and click on Order Media for details.

Or, if you prefer, you can do the same by contacting HP Customer Service:

If you live in the US or Canada, contact information is on this page: http://www8.hp.com/us/en/contact-hp/phone-assist.html#section1

If you live elsewhere, contact information is on this page: http://www8.hp.com/us/en/contact-hp/ww-contact-us.html

NOTE: After you get through, stay on the line until you are finally able to talk to some one -- it can take a while!

If you have trouble finding a phone number, then try: 1 (650) 857-1501.

If HP no longer provides Recovery Media for your model, another site you can check is: http://www.computersurgeons.com

When you get the media, if it is a USB stick, insert it into your PC, pressing F9 to get a Boot menu, then select the External USB Hard Drive to boot from it.