Can someone please help me with this?

One day I was using the camera and all of a sudden the camera app closed and said there was an error. I was trying to take a picture, so I turned my phone off because I figured a reboot would probably fix it. Instead, I have never been able to turn my phone back on again!

My phone is stuck in an endless reboot cycle. As soon as I put the battery in, the phone vibrates and the word Nokia displays with no backlight. Then the phone turns off and the screen goes off completely.

Next, the phone vibrates and turns back on while showing "Nokia" on the screen (this time with the backlight on). Then the phone turns off again and the screen goes off completely. This part continues repeating forever.

The dots never show. And the power button is useless. Nothing works. If I plug in a USB cable, I do get the icon on the upper right of the screen. But when I try to reflash the device I get the "Suitable USB device not found, waiting" message. I have tried my own laptop (windows 7) in regular mode and in winxp compatibility mode. And I have also tried my friend's computer that has winxp installed. Both just sit at the waiting message.

Update: While i was typing this, after the phone rebooted several times and was plugged into my friends computer, it said "Malfunction! Device shutdown in 10sec" in green letters while the word Nokia was showing and the backlight was on.

How can I get this phone flashed? I have files and contacts I havent backed up

Thank you for anyone who can help!