Published Mar 25, 2013 | Updated Sep 15, 2017


Detected with Windows Defender Antivirus

Aliases: Trojan horse Startpage.TMI (AVG) Trojan.Win32.Startpage (Ikarus) RDN/Generic StartPage!p (McAfee)


Trojan:Win32/Preflayer.A is a trojan that changes the home page for Internet Explorer, Google Chrome, Mozilla Firefox, and Yandex.

To detect and remove this threat and other malicious software that may be installed on your computer, run a full-system scan with an appropriate, up-to-date, security solution. The following Microsoft products detect and remove this threat:

Additional remediation instructions for Trojan:Win32/Preflayer.A

This threat may make lasting changes to a computer's configuration that are NOT restored by detecting and removing this threat. For more information on returning an infected computer to its pre-infected state, please see the following articles:

  • Changing your Internet Explorer Home Page:
    1. Go to %AppData%\Microsoft\Internet Explorer\Quick Launch
    2. Right-click on Launch Internet Explorer Browser and choose Properties
    3. In the Target field, delete the URL after the command %ProgramFiles%\Internet Explorer\iexplore.exe
    4. Click OK
    5. Repeat steps 2 to 4 for %AppData%\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar
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