After spending a few months relying on the Linux operating system for protection, Microsoft appears to have switched its Web site back to its own Windows 2003 Server software. “Since August, requests to had the look and feel of being served up by open source code,” The Register reports. “Microsoft enlisted hosting provider Akamai’s Linux server army to fend off a disheartening number of DDoS attacks, worms and the like. According to Netcraft, however, Microsoft returned to itself on Nov. 26.”