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Issue

• "ESET Smart Security installation was ended prematurely"
• Installation is not successful: "Rolling back action"
• Base Filtering Engine is missing

Users may receive one of the following messages:

• "ESET Personal firewall initialization failed"
• "Services not started"
• "Virus scanner initialization failed"
• "The computer has not been restarted after a program uninstallation. Please restart the computer and run the installer again."
• "An error occurred while starting services. Analysis of application protocols (POP3, HTTP) will not function"
  
  • Also see this Knowledgebase article for the message above

This solution applies to Windows 7 and Windows Vista only

Details

Solution

I. Verify that the Base Filtering Engine is missing

1. Click Start, type services.msc into the search field and then click services. 

Figure 1-1 

2. Look for the Base Filtering Engine entry in the "Name" field, which is sorted alphabetically. 

Figure 1-2
Click the image to view larger in new window

3. If the Base Filtering Engine entry is present, please provide an installation error log to Customer Care to help resolve your issue. If the Base Filtering Engine entry is missing, follow the instructions from Part II below.
    

II. Reinstall the Base Filtering Engine

1. Download the ESET ServicesRepair utility and save it to your Desktop.

   Unable to download "ServicesRepair.exe contained a virus and was deleted"

   Your computer may be infected by Sirefef. If you cannot download the tool, follow the steps below:
    

   1. Click Start  Computer  Local Disk (C:)  Program Files. 
       
   2. Right-click the Windows Defender folder and select Rename from the context menu.
       
   3. Add a unique variation to the filename, such as .old (for example, Windows Defender.old).
       
   4. See our Knowledgebase article How do I remove Sirefef (ZeroAccess) trojan? for instructions to remove this malware.
       
   5. After you have removed any malware from your computer, make sure to rename the Windows Defender folder back to its original filename.
2. Double-click ServicesRepair.exe to run the ESET ServicesRepair utility. If you are using User Access Control, click Runwhen prompted and then click Yes when asked to allow changes.

Figure 2-1
 

3. Follow the prompts to repair the Base Filtering Engine service. Once the ServicesRepair utility finishes running click Yesto restart your computer.

Figure 2-2

4. Once your computer restarts, install your ESET product using the instructions from the appropriate Knowledgebase article below:
    
   • How do I Download and Install ESET NOD32 Antivirus? (6.x)
      
   • How do I Download and Install ESET Smart Security? (6.x)
   
    
5. ESET Smart Security Users only: Because the ESET ServicesRepair utility restores the Windows Firewall to on by default, you will need to disable the Windows Firewall to prevent conflicts with the ESET Personal Firewall. For instructions on how to disable the Microsoft Windows Firewall, click the link that corresponds to your operating system from the links below:
     
   
   • Turn Windows Firewall on or off in Windows 7 
     
   • Turn Windows Firewall on or off in Windows Vista
     

If after restoring the Base Filtering Engine and running the ServicesRepair tool you are still unable to complete installation your computer may be infected with Sirefef malware. Visit the following Knowledgebase article for illustrated instructions to remove Sirfef:

• How do I remove Sirefef (ZeroAccess)trojan?

Source : http://kb.eset.com/esetkb/index?page=content&id=SOLN2861