How are you using your comp?
Hold down the option key>Finder>Go>Library>Preferences. Trash the com.apple.finder.plist file, repair permissions and restart your comp. Please post back the results.
NOTE: In Lion and Mountain Lion the Home/Library folder is now invisible. To make it permanently visible enter the following in the Terminal application window: chflags nohidden ~/Library and press the Return key - 10.7: Un-hide the User Library folder.
Above authored by OT