Browsing Software Hack/Tweak
Turn Off Automatic Defragmentation
Windows Vista uses an always-on defragment set up that isn't that necessary and will cause your system to slow down.
Change default install location for apps
Windows uses the C:\Program Files directory as the default base directory into which new programs are installed.
Removing or Adding Items to Your Persistent Connections List
Windows stores the names of previously mapped drives, this can be a security threat if vunerable hidden shares are listed.
Reset Shell Folders Default Paths
Windows stores the location of per-user special folders under the following registry key: HKEY_CURRENT_USER \ Software \ Microsoft \ Windows \ CurrentVersion \ Explorer \ User Shell Folders Some software, such as TweakUI, can modify these default settings, causing incomplete or incorrect information to be displayed on the desktop, start menu, as well as other places.
Use ReadyBoost with any USB device
Windows ReadyBoost is a great technology, caching things on USB drives to improve system performance, and works really well for giving your system a little more oomph.
Restricting Applications Users Can Run
Windows gives the ability to restrict the applications that can be run by users on a workstation.
Windows 7 Full Screen Command Prompt
Windows 7 has a great interface.