The following instructions have been created to help you to get rid of "Delf.Spool.cn" 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:

Categories:
  • trojan

Description:
This trojan horse replaces the orignal spoolsv.exe with its own to get started by the system and run in background. Variants may also connect to a chinese website in background. After fixing with Spybot-S&D please restore the original spoolsv.exe from the c:\windows\system32\dllcache folder to the c:\windows\system32 folder.
Supposed Functionality:
Supposed to be the Windows file spoolsv.exe
Removal Instructions:

Files:

Please use Windows Explorer or another file manager of your choice to locate and delete these files.
  • The file at "<$SYSDIR>\spoolsv.exe".
  • The file at "<$SYSDIR>\dllcache\spoolsv.exe".
  • The file at "<$SYSDIR>\delself.bat".
  • You may need to move the file "<$SYSDIR>\ntdoss04.sys" to "<$SYSDIR>\dllcache\spoolsv.exe".
Make sure you set your file manager to display hidden and system files. If Delf.Spool.cn 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!

Important: There are more files that cannot be safely described in simple words. Please use Spybot-S&D to remove them.

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.