Cannot login to Windows login screen and can't system repair.

[BurningMercy]

Hi, I'm new here. I created this account for help because my mother's password seems changed and she couldn't login, the keyboard wasn't sticky so she didn't mistype, caps lock wasn't on. I typed it my self and it didn't work, restarted the computer and it didn't work neither. I then go to thinking it was hacked and the password was simply changed. I go looking around for password changing boots for my flashdrive. I burned PASSCAPE on to my 16gig 2-1 flashdrive. Tried booting on all settings, booted normally, didn't work. So, I ignored it for a while and kept clicking "Reset password" button, It showed up as "Passcape" but claimed the usb slot was empy, wasn't; the slot is "F". I gave up hope on it, so I found this youtube video to reset it the manual labor way-here's the link to it: " https://www.youtube.com/watch?v=DLtJ-iDdWC0 " So, continuing on..

I was simply following the video's instructions, so at step one at duration "2:02" I have to cause a error, I just keep shutting-down the pc while it's booting, because windows will assume it's an error after 2 - 3 times of doing so. Okay, by the time I get to "Repair your computer" button I press enter. And the shocking surprise I get which is odd is this in quotes:
" Windows Boot Manager

Windows has failed to start. A recent hardware or software change might be the cause. To fix the problem:

1. Insert your windows installation disc and restart your computer.
2. Choose your language settings, and then click "Next."
3. Click "Repair your computer."

If you do not have this disc, contact your administrator or computer manufacturer for assistance.


Status: 0xc000000f
Info: A required device isn't connected or can't be accessed. "

I can't manually reset the password at all, can't login, can't boot the flashdrives or CD's on this laptop.
Me and my mother think it was hacked, but don't know why or how. Oh-also I forgot to mention I changed a few bios-settings on the usb slots because the instructions for the Password reset tool said I needed to change "your bios-settings, then save changes and reset your computer." After knowing they wouldn't work, went back to BIOS and reset settings back to default-saved and reset. Then went for the URL link above. ^
I'd love to get this problem fixed immediatly. I don't have a "Windows installation disc" but, hopefully I won't need one. My mother's PC specs that I know of are:

Model name: Insperion 15-3537
Manufacturer: Dell
Type: Laptop
Proccessors: 2
Graphics Proccessing Unit: Intel core I5
Year: 2010

I really hope this can help me, thanks everyone here on this community.

 

[BurningMercy]

NEWS FLASH: I just learned something new about the password problem, my mother never told me exactly what the problem is but I've been typing it wrong the entire time, typed it in and this in quotes is my discovery:

" The User Profile Service service failed the logon.
User profile cannot be loaded. "

She never told me exactly what was the problem everyone, all she said is "Did you change the password" (waking me up at 8AM) then "The password is changed and I can't get on!" What is this problem we are experiencing-i've never seen this before.

 

[Jacee]

See if this works: https://support.microsoft.com/en-us/kb/947215