If your computer is suddenly doing strange things such as running very slowly, or you are suddenly getting pop ups advertising various products such as the notorious Winfixer, along with others such as Storage Protector, Sysprotect, and AntiSpywareMaster (that are really spyware, not anti-spyware), your computer may be infected with the Vundo virus. Known also as the Vundo Trojan, Virtumonde, or Virtumondo and sometimes even as MS Juan (which Vundo leaves in your registry), the Vundo virus was first discovered back in 2004, but has recently made a reappearance, infecting countless PCs. And it’s darn hard to eradicate.