Vista, thy name is bloat! The latest Windows packs a lot of code -- more than any version of Windows ever -- and some of it is just plain unnecessary. All of that excess code has a way of slowing down an operating system. You can regain some PC performance by removing unneeded features.
Here’re a dozen Vista features that you can turn off right now. Some are shiny baubles that slow down graphics performance, while others are optional utilities that hog memory when they shouldn't. A few can actually be quite useful, though they play a major role in bogging down your PC.
Sidebar: You pay a heavy performance price for the analog clock, thumbnail slide-show viewer, and Microsoft-centric RSS news feed that dock in the Windows Sidebar. Turning the whole thing off gives you a big speed boost, especially at boot time.
To remove the Sidebar, right-click anywhere on the Sidebar and select Close Sidebar. Uncheck Start Sidebar when Windows starts, and then click OK.
Aero: Microsoft put a lot of Vista's visual enhancements under one technological and marketing umbrella: Aero. Among those features are the thumbnails of your windows that appear when you hover the mouse pointer over the taskbar, as well as the Flip 3D view you get by pressing Windows-Tab. Aero adds a little practicality and a lot of panache to the Vista user interface, and personally, I like it.