Y lo dice Brian Krebs del Washinton Post. Al parecer una nueva actualización del Microsoft Antispyware detectaba archivos del Norton Antivirus como el virus as PWS.Bancos.A, los eliminaba y ¡plaf! el Norton Antivirus ya no funcionaba.
Lo curioso es lo que comenta Brian y que da que pensar:
It's a good idea to keep in mind that Microsoft's Anti-Spyware product is in beta mode: The company's product page explicitly says that Microsoft Anti-Spyware should not be deployed in production systems. I'm not apologizing for Redmond in any way; it just seems like too many people ignore warnings about beta products.