From Homestar Runner Wiki
System Sounds with a Homestar Runner theme are available from the Downloads page.
 Available Sounds
 Startup Sound
HOMESTAR RUNNER: "Doo, doodle ding deling ding ding ding diiing... ding." (mimicking the Windows 95 default startup sound)
 Email Notification
STRONG BAD: "Oh, electronic mail!" (from studying)
HOMESTAR RUNNER: "Email!" (from Main Pages)
 Email Deletion
HOMESTAR RUNNER: "Baleeted!" (from 50 emails)
 Error Sound
STRONG BAD: "Why, you lazy crap for crap!" (from The House That Gave Sucky Treats)
HOMESTAR RUNNER: "OOPS! You bwoke it." (from the old Strong Bad 404 Error Page)
 Shutdown Sound
STRONG BAD: "It's about time! Why don't you go outside or something? Nerd."
HOMESTAR RUNNER: "Did you remember to save? All of your files?"