Mssys Trojan


Mssys Trojan is also known as TROJ_VANTA.A.


Trojan Horse


mssys.exe, msdos.exe

If you have any of the files related to Mssys Trojan on your system, please send them for additional analysis. Generally, I have only analysed a few versions for each software component listed at this web site. With your help I will be able to look at both old and more recent versions of the Mssys Trojan software. Thank you very much for your time!

Log references

Log 189 Log 199



Privacy policy

No privacy policy available.


Bazooka Adware and Spyware Scanner detects Mssys Trojan. Bazooka is freeware and detects spyware, adware, foistware, trojan horses, viruses, worms and other potentially unwanted applications. Read more »

Uninstall Mssys Trojan with FreeFixer

I'm working on a general purpose tool for removing unwanted software. The tool is called FreeFixer and can help you remove unwanted Browser Helper Objects, Internet Explorer toolbars and software that starts automatically when you reboot your computer, so it can offer some assistance while uninstalling Mssys Trojan. The manual removal instructions listed below will help you to identify what to delete with FreeFixer.

Read more about FreeFixer.

Manual removal

Please follow the instructions below if you would like to remove Mssys Trojan manually. Please notice that you must follow the instructions very carefully and delete everything that is mentioned. In most cases the removal will fail if one single item is not deleted. If Mssys Trojan remains on your system after stepping through the removal instructions, please double-check by stepping through them again.

  1. Start the registry editor. This is done by clicking Start then Run. (The Run dialog will appear.) Type regedit and click OK. (The registry editor will open.)
  2. Browse to the key:
    'HKEY_LOCAL_MACHINE \ SOFTWARE \ Microsoft \ Windows \ CurrentVersion \ Run'
  3. In the right pane, delete the value called 'MsSystem', if it exists.
  4. Exit the registry editor.
  5. Restart your computer.
  6. Start Windows Explorer and delete:

Problems uninstalling? Click here.

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Contact information for Mssys Trojan's vendor

In order to provide correct, accurate and updated information about Mssys Trojan I encourage the vendor to contact me if any part of this write-up needs a revision.

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Related links

Bazooka - Free scan for spyware, adware, trojan horses, keyloggers, etc. Detects more than 500 potentially unwanted applications. Freeware!

The File Database - Search the file database for more information. Free!

PopUp Blocker Test - Find out if your pop-up killer can handle all pop-ups. Free!

Kephyr Labs - Find out what is going on at Kephyr. Try products in an early stage of development.

Read more about FreeFixer, Kephyr's latest spyware removal tool.
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