W32.Downadup.B Malware - Tool Symantec

Hello

In one computer with Windows XP Embedded detect dialy a malware W32.Downadup.B , and I like to know if the tool of Symantec delete 100% this malware or is batter to do a reinstalation of Windows?

And the ADC feature can use in windows xp - Sep 12?

Reading this KB - https://support.symantec.com/en_US/article.TECH93179.html I like to apply the recomendation :

Remediation: If you have infected computers

• Use the fix tool
  
  Symantec provides a stand-alone removal tool for Downadup, Downadup.B, and Downadup.C to help customers that are infected with this threat.
• Disable the Downadup domain blocking
  
  On infected computers, Downadup may block your connection to Web sites that can help you, such as www.symantec.com. To defeat this behavior, click Start > Run, and type the following:
  
  
  
  net stop dnscache
  
  
  
  This disables the blocking, and allows you to connect to security vendors' Web sites.

Regards

Miguel