My PC gives a very long beep when it starts up. But it does start up. More over, it automaticall types the / character in the password field sometimes.
sometimes behaves upnormally by not letting to type any character....
Y is it so?
Try running the Dell Diagnostics Test (the full version) to see if it detects any problems. Here's how: How to Run the Dell. If it does, contact Dell Support for assistance (there's a link near the bottom of the above article).
I hope this helps. If the test comes back completely clean, then post back and we'll try something else (or if your computer is still under warranty, contact Dell Support anyway as they should be happy to assist you and know more about your computer than we do).