Disable User Access Control (UAC).

This much-loathed new Vista feature attempts to protect your system from malware infection by making you manually confirm a whole host of everyday user operations. While it doesn’t directly impact performance, it can be annoying and might be more hassle than good.

To disable User Access Control:

• Click Start then Control Panel
• Select User Accounts
• Select Turn User Account Control on or off
• Uncheck User Account Control Box
• Restart as recommended