Windows 7 improves much on UAC, reducing the times of popping up prompt, meanwhile, it helps to move the ecosystem to such an environment. Under that environment, everyone could run as default standard user.
 There’re another improved functions, like SmartScreen filter and Clickjacking defence technologies, which are primarily deployed on IE8. Even better technical protection needs user to make a smart choice to protect from malicious attackers and the attacks by malicious software.
What’s the difference between Windows 7 and Vista on security protection?
As a matter of fact, Windows 7 operation system is constructed on the base of Vista system and improved much! Windows 7 also covers Security Development Lifecycle, which is the key security technology of Vista.
  Besides, there’re some other important security functions, including User Account Control (UAC), kernel repair protection, Windows Service Hardening, address space layout randomization and Data Execution Protection (DEP) etc. Moreover, there’s also new security function, such as AppLocker, helping the applications control running in own environment. In a word, Windows 7 integrated IE8 provides flexible security protection, avoiding malicious software and attacks.