What is Immunization?

The Immunization feature provides Internet Protection by preventing users from entering malicious, untrusted or potentially dangerous websites.

This is done by adding malicious entries to the Windows hosts file.

It also prevents tracking cookies from entering your system and blocks known spyware installers (and similar baddies) already included in Spybot’s database.


FAQ Category: Immunization, Spybot 2

How do I perform Immunization?

To perform Immunization:

– Open Spybot’s “Start Center” by right clicking on the icon  and choosing  “Run as administrator”.

– Go to “Immunization”

– Click “Check System”, then click “Apply Immunization”.


FAQ Category: Immunization, Spybot 2

When I run Immunization it says items are still unprotected. How do I fix this?

You need to run the immunization with elevated privileges, otherwise all global immunizations will fail.

To ensure that Immunization is applied correctly, Please disable all other security programs that you run and close all browsers and any other programs during the work with Spybot – Search & Destroy.

To Immunize your browser:

– Open Spybot “Start Center” by right clicking on the icon  and choosing  “Run as Administrator”.

– Go to “Immunization”

– Click “Check System”, then click “Apply Immunization”.

The main reasons why Immunization would fail are:

– A path is not detected.

– The object is blocked by something; e.g. a security program.

– The user does not have appropriate rights for Immunizing an object.


FAQ Category: Immunization, Spybot 2

How do I view the Immunization log?

To view the Immunization log:

– Open the Spybot Start Center by right-clicking the Spybot icon and choosing the option to “Run as Administrator”.

– Open “Immunization”.

– Click “Show previous Logs”.

If you cannot access this folder, you may need to change your folder properties:

– Open Windows Explorer (or any folder).

– Press the “Alt” button, then go to “Tools”, then “Folder Options”.

– Click on “View”, then select “Show Hidden Files, Folders and Drives”.


FAQ Category: Immunization, Spybot 2

How do I undo Immunization?

You can undo Immunization if you wish, to see if it causing any issues with access to certain websites.

To undo Immunization:

– Open the Spybot – Search & Destroy “Start Center“.

– Go to Immunization and select “Undo Immunization”.


FAQ Category: Immunization, Spybot 2

How do I reset the hosts file?

You can reset the hosts file to its original configuration.

To do this, please first undo your immunization by going to:
Start Center > Immunization

In Immunization:
Click “Undo Immunization”.

You can then navigate to the hosts file location:
C:\Windows\system32\drivers\etc\

This folder contains your “hosts” file, along with many regularly-created backups of the hosts file.

You can then delete the hosts file and the backup host files and restore a default hosts file.

TO do this, please see the following link on how to restore the hosts file:
https://support.microsoft.com/kb/972034

Please do not delete other files located in this folder.


FAQ Category: Immunization, Spybot 2

What is the immunization feature and what are the other permanent protection options?

Spybot – Search & Destroy offers the Immunization – a feature to allow you to immunize your computer against certain spyware.
It also allows you to use native browser settings to block cookies, malware installations,
bad websites and other threats via ActiveX.


FAQ Category: Immunization, Spybot 2

Why are some of my favourite internet sites blocked?

In that case the immunization has to be undone. To do so run the Start Center and click on “Immunization“. On the navigation bar on the left you can “Undo immunization“.
Please note: Now the bad downloads will not be blocked any longer! You may have to restart your computer. Then try again to open your favourite pages. Do not forget to Immunize again after visiting that page.


FAQ Category: Immunization, Internet Protection, Known Issues, Spybot 2, Spybot Proxy

Why does the immunization “not work”?

On Windows Vista / Windows 7 / Windows 8, you need to run the immunization with elevated privileges, otherwise all global immunizations will fail.
To elevate, right-click the Spybot – Search & Destroy shortcut and choose Run as Administrator.
Spybot 2 will offer you to run the Immunization elevated if you do not run it as described above.
If you have chosen to not have this dialog shown again when it was previously shown,
you can re-enable it by using the Dialogs tab of the Settings window.

If you think nothing has been immunized, please make sure you have clicked on “Check system” which can be found on the navigation bar on the left. This will check for already applied immunization.

In order to immunize correctly please close all open browsers.
Also using more than one security software with resident protection can cause conflicts.
Please take a look at this thread in our forum: Various reasons for incomplete immunization


FAQ Category: Immunization, Spybot 2