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infected with siref trojan

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I think my computer has been infected with the siref trojan. The message "Windows has encountered a critical problem and will restart automatically in one minute. Please save your work now." appears and the computer shuts down shortly afterwards, only to reboot itself and start the cycle once more.

In the one minute I have before it shuts down I have been able to access Microsoft Security Essentials and see what threats have been detected. This is where it mentions the siref trojan.

I am operating on the Windows 7 Home Premium operating system.

I have tried to boot in safe mode but the same thing happens.

Please can anyone help? Please bear in mind I have only 1 minute to do anything once I have booted up before it shuts down. Please also bear in mind I am not very technical and I have never had to deal with this type of threat before.

Thank you in advance.

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Hello and welcome to Malwarebytes

If you think you are infected, here are the steps needed to get your computer cleaned....

Please read the following so that you can begin the cleaning process:

IMPORTANT: Don't use any temporary file cleaners unless requested - this can cause data loss and make recovery difficult

You have 3 Options that you can choose from as listed below:

  • Option 1 —— Free Expert advice in the Malware Removal Forum
  • Option 2 —— Paying customer -- Contact Support via email
  • Option 3 —— Premium, Fee-Based Support


As we don't deal with malware removal in the General Malwarebytes' Anti-Malware Forum, you need to start a topic in the

Malware Removal forum so a qualified helper can help you fix any malware related problems/infections you may have.

  • Please read and follow the directions >>Right HERE<<, skipping any steps you are unable to complete.
  • After posting your new post, make sure under options, you select Track this topic and choose Immediate Email Notification,
    so that you're alerted when someone has replied to your post.

NOTE: Please do not post back to (bump) your topic within the first 48 hours.

Replying to your own posts changes the post count and helpers are looking for topics with zero replies.

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Alternatively, as a paying customer, you can contact the help desk by filling out the form located >>Right HERE<<


If you would like to use our Malwarebytes Premium Services, Comprehensive solutions to all your computer support needs—from installation and set-up to troubleshooting and tune-ups go to our Malwarebytes Premium Services support site >>Right HERE<<

Please be patient, someone will assist you as soon as possible.

PS: Please use the "Reply to this topic" oeXUf.png button not the Reply button when you start replying.

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