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Backdoor:Win32/Delf.QO description and removal instruction


Free Backdoor:Win32/Delf.QO Scan

Technical information
Removal instructions

Technical information

The Backdoor:Win32/Delf.QO will install rogue security software Navierra Backup into the affected computers without users knowledge. The Backdoor:Win32/Delf.QO file size is 23104 bytes.


Once launched, the Backdoor:Win32/Delf.QO performs the following actions:

  • Download rogue security tool Navierra Backup from the following domains:
  • Modify the properties of the following files:

    (23104 bytes; detected by HitMalware as " Backdoor:Win32/Delf.QO")
  • Removal instructions

    If your machine doesn't have antivirus/antispyware, please take the following steps to resolve the problems caused by Backdoor:Win32/Delf.QO:

    1. Replace the infected file fs_rec.sys for free by using fs_rec.sys repair tool - DLL Suite. See how to replace fs_rec.sys by using DLL Suite.

    2. Perform a full Backdoor:Win32/Delf.QO scan by using the latest antivirus/antispyware HitMalware.
    (Download Trial Version Now)

    MD5: 78635017863501

    How to replace fs_rec.sys by using DLL Suite

  • Download DLL Suite, install and run
  • Click "Start Scan" button to check fs_rec.sys file
  • Choose fs_rec.sys and click "More Information"
  • Download fs_rec.sys for free from the open web page
  • Save fs_rec.sys to its default folder to replace infected fs_rec.sys file.
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