The following instructions have been created to help you to get rid of "Win32.LinkBot" manually.
Use this guide at your own risk; software should usually be better suited to remove malware, since it is able to look deeper.

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Threat Details:

  • malware

Win32.LinkBot gets installed without user consent. It creates an autorun entry and creates the file defragfatz.exe in Windows system directory.
Removal Instructions:


Please use Spybot-S&D, RunAlyzer or msconfig.exe to remove the following autorun entries.
  • Entries named "Windows DLL Loader" and pointing to "<$SYSDIR>\defragfatz.exe".


Please use Windows Explorer or another file manager of your choice to locate and delete these files.
  • The file at "<$SYSDIR>\defragfatz.exe".
  • A file with an unknown location named "defragfatz.exe".
Make sure you set your file manager to display hidden and system files. If Win32.LinkBot uses rootkit technologies, use our RootAlyzer or our Total Commander anti-rootkit plugins.
You will have to use a global search for files without a name specified. Be extra careful, because just the name might not be enough to identify files!

Final Words:

If neither Spybot-S&D nor self help did resolve the issue or you would prefer one on one help,
  1. Please read these instructions before requesting assistance,
  2. Then start your own thread in the Malware Removal Forum where a volunteer analyst will advise you as soon as available.