How do I get out of safe mode on my dell vastro 2521?

If the computer is running, shut down Windows, and then turn off the power
Wait 30 seconds, and then turn the computer on.
Start tapping the F8 key. The Windows Advanced Options Menu appears. If you begin tapping the F8 key too soon, some computers display a "keyboard error" message. To resolve this, restart the computer and try again.
Ensure that the Safe mode option is selected.
Press Enter. The computer then begins to start in Safe mode.
When you are finished with all troubleshooting, close all programs and restart the computer as you normally would.

Once you have solved the problem that sets it in "safe mode", you can reboot the computer into normal mode.

Look in the Control Panel.
Pick device manager and look for a yellow balloon, which will show why it is still in safe mode.