Hello, welcome to MalwareTips.
I'm Fiery and I will be assisting you with your computer issues. I notice you said there were messages that said "system shut down on them 12.11 or 12.12." Were these error messages that suddenly occurred and did you download or install any software prior to getting these messages?
If you can't boot, we are going to be using a
Windows Recovery Environment to help disinfect the system so it may boot again. You will need access to another computer and a CD to perform the following. If you rather use an USB for this, please follow the instructions
here
If you choose to use a CD,
Download the OTLPE Standard REATOGO Windows Recovery Environment.
- Place a blank CD-R disc in to your CD burning drive.
- Download OTLPEStd.exe and double-click on it to burn to a CD using ISO Burner.
- Reboot your system using the boot CD you just created.
Note : If you do not know how to set your computer to boot from CD follow the steps here
- Your system should now display a REATOGO-X-PE desktop.
- Double-click on the OTLPE icon.
- When asked "Do you wish to load the remote registry", select Yes
- When asked "Do you wish to load remote user profile(s) for scanning", select Yes
- Ensure the box "Automatically Load All Remaining Users" is checked and press OK
- OTL should now start. Change the following settings
- Change Drivers to Non-Microsoft
- Press Run Scan to start the scan.
- When finished, the file will be saved in drive C:\_OTL\MovedFiles
- Copy this file to your USB drive if you do not have internet connection on this system
- Please post the contents of the OTL.txt file in your reply.