Hi, I'm Bhavik. Welcome to JustAnswer. I'm reviewing your question now, and will reply back ASAP.
Can you send me its screen shot to me? Have you installed system updates recently ?
You can attach it to the chat message ,from the place where you are sending messages to me.
Okay, I got you . Please remove all the USB devices from your computer. Like USB mouse,Keyboard etc. Also check DVD drive as well.
You are having windows XP right ? Since when you are seeing this ?
No, Not power cord as of now. Try removing mouse,Keyboard, CD/DVD, Pen drive from your desktop.