Internet Security 2010 removal from shutdown

Hello

Well my wife's computer got he IS 2010. It has been shut down, and i am having to reboot.

How do i bypass the signon process to boot Malwarebytes' Anti-Malware.

I am not real good with computers I have down loaded panda 3.322, as use their software.

this computer has valuable content so I am looking for help.

R:)

Please download the current version of HijackThis from HERE

• Double click and run the installer.
  
• It will install to C:\Program Files\Trend Micro\HijackThis\hijackthis.exe
  
• After installing, you should get the user agreement, press accept and Hijack This will run.
  
• Select Do a system scan and save a log file. This will open a notepad file of everything Hijack This found, copy and paste it back here.
  

well its to late as i went to do the recover console and got the full recovery. NOw i have reformatted the hard drive. It said it did a back up but now i need to recover the hard drive.

Where did this virus come from ??