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I have a desktop that is in a constant Windows 7 reboot loop.  I scanned with Avira Boot CD and found several threats to include a Trojan, a java exploit, and a virus.  Could these cause this issue.  Are there any really good procedures for cleaning a computer that will not boot to the OS?

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Hello mw_joiner

I would like to welcome you to the Malware Removal section of the forum.

Around here they call me Gringo and I will be glad to help you with your malware problems.

Very Important --> Please read this post completely, I have spent my time to put together somethings for you to keep in mind while I am helping you to make things go easier, faster and smoother for both of us!

  • Please do not run any tools unless instructed to do so.
    • We ask you to run different tools in a specific order to ensure the malware is completely removed from your machine, and running any additional tools may detect false positives, interfere with our tools, or cause unforeseen damage or system instability.
  • Please do not attach logs or use code boxes, just copy and paste the text.
    • Due to the high volume of logs we receive it helps to receive everything in the same format, and code boxes make the logs very difficult to read. Also, attachments require us to download and open the reports when it is easier to just read the reports in your post.
  • Please read every post completely before doing anything.
    • Pay special attention to the NOTE: lines, these entries identify an individual issue or important step in the cleanup process.
  • Please provide feedback about your experience as we go.
    • A short statement describing how the computer is working helps us understand where to go next, for example: I am still getting redirected, the computer is running normally, etc. Please do not describe the computer as "the same", this requires the extra step of looking back at your previous post.
NOTE: At the top of your post, click on the "Follow This Topic" Button, make sure that the "Receive notification" box is checked and that it is set to "Instantly" - This will send you an e-mail as soon as I reply to your topic, allowing us to resolve the issue faster.

NOTE: Backup any files that cannot be replaced. Removing malware can be unpredictable and this step can save a lot of heartaches if things don't go as planed. You can put them on a CD/DVD, external drive or a pen drive, anywhere except on the computer.

NOTE: It is good practice to copy and paste the instructions into notepad and print them in case it is necessary for you to go offline during the cleanup process. To open notepad, navigate to Start Menu > All Programs > Accessories > Notepad. Please remember to copy the entire post so you do not miss any instructions.

For x32 (x86) bit systems download Farbar Recovery Scan Tool and save it to a flash drive.

For x64 bit systems download Farbar Recovery Scan Tool x64 and save it to a flash drive.

How to tell > 32 or 64 bit

Plug the flashdrive 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 in notepad and press Enter.
  • The notepad opens. Under File menu select Open.
  • Select "Computer" and find your flash drive letter and close the notepad.
  • In the command window type e:\frst64.exe or e:\frst.exe and press Enter

    Note: Replace letter e with the drive letter of your flash drive.

  • The tool will start to run.
  • When the tool opens click Yes to disclaimer.
  • First Press the Scan button.
  • It will make a log (FRST.txt)
I want you to poste the FRST.txt report into your reply to me

Gringo

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Just an update.  I appreciate the help Gringo, but I had to figure out this one on my own due to time issues.  I had to load certain registry hives and reconfigure certain keys.  Also, there were a few trojan infections on the machine that were removed using Avira boot CD.  Thanks again!

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