I don't recommend using WDO . It will kill your mbr afterwards .
If you have a USB drive do the followering
Tip
Download the Tool from a non infected PC
Download Farbar Recovery Scan Tool
Here
Farbar Recovery Scan Tool Download
Click on the Download Now button that goes with your bit version
Note
Click the
button and right-click Computer .Select Properties .Look for
System Type: which will say 32-bit Operating System or 64-bit Operating System
Plug the flash drive into the infected PC.
Enter System Recovery Options.
To enter System Recovery Options from the Advanced Boot Options:
Restart the computer.
As soon as the BIOS is loaded begin tapping the F8 key until Advanced Boot Options appears.
Use the arrow keys to select the Repair your computer menu item.
Select US as the keyboard language settings, and then click Next.
Select the operating system you want to repair, and then click Next.
Select your user account an click Next.
To enter System Recovery Options by using Windows installation disc:
Insert the installation disc.
Restart your computer.
If prompted, press any key to start Windows from the installation disc. If your computer is not configured to start from a CD or DVD, check your BIOS settings.
Click Repair your computer.
Select US as the keyboard language settings, and then click Next.
Select the operating system you want to repair, and then click Next.
Select your user account and click Next.
On the System Recovery Options menu you will get the following options:
Startup Repair
System Restore
Windows Complete PC Restore
Windows Memory Diagnostic Tool
Command Prompt
Select
Command Prompt
In the command window type e:\frst.exe (for x64 bit version type e:\frst64) and press Enter
Note
Replace letter e with the drive letter of your flash drive.
Tip
Type the commands below to see what your letter is for the USB drive and press ENTER after each command
Code:
Diskpart
List volume
The tool will start to run.
When the tool opens click Yes to disclaimer.
Press Scan button.
FRST will let you know when the scan is complete and has written the FRST.txt to file
Please copy and paste both logs in your reply.(FRST.txt and Addition.txt)