Kick that junk to the curb. You can venture into the Control Panel and click Uninstall a program, or use one of our favorite freebies, , to make a clean sweep; the utility not only uninstalls software, but also removes leftover files and Registry entries. Just make sure not to firebomb anything important, like Adobe Flash Player or Microsoft .Net Framework.

Works in: 7 , one of Windows 7's most celebrated enhancements, temporarily turns all your windows transparent when you mouse over the Show Desktop button. However, if you accept the default settings, the effect takes nearly a full second to kick in. Why wait? A simple Registry hack will enable instantaneous transparency.

Press the Windows key to open the Start menu, type regedit in the search box, and press Enter. In the Registry, navigate to HKEY_CURRENT_USER\ Software\Microsoft\Windows\CurrentVersion\ Explorer\Advanced. Right-click an empty area in the right pane, and choose New, DWORD (32-bit) Value. Name it DesktopLivePreviewHoverTime. By default, Windows will assign a value of 0, which is exactly what you want. Now just restart your computer (or log off and back on). The next time you mouse over Show Desktop, you'll be Peeking at light speed.