The following instructions have been created to help you to get rid of "Blocker.zun" 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:
  • malware

Description:
Blocker.zun is a malware that installs hundreds of variants of itself to the system start. All of its instances will start and run in the background, this causes the computer to slow down immensely until it is almost unusable. Since the computer may not response during the scan and clean procedure it might be required to boot the computer in Windows safe mode using a different administrator account or with the Spybot-S&D boot CD.
Removal Instructions:

Autorun:

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

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.