Lotus Notes doesn't start..?

What could possibly be the problem?

Lotus Notes doesn't start..?
Did you try rebooting your computer? Sometimes, when you don't exit Notes the correct way (like when it hangs), it leaves parts of itself behind in memory and won't allow you to start it up again because it thinks it's already running. If you bring up the Task Manager, you'll see little programs that start with NL*.exe. Rebooting your machine should clear them out.