Unknown by the computer

Consider NOT connecting the camera to the computer.

The best way to download pictures from your camera to your computer involves removing the memory card from the camera and plugging it into a card reader (either built-in to the computer or connected via USB or FireWire). This is likely to be faster than connecting the camera to the computer, and won't run down your camera's batteries.

Once the card is plugged in, it will appear to your computer as a removable drive. You can use the operating system's drag&drop facility to copy pictures from the card to the computer's hard drive. Or you can use any photo cataloging program.

what is the connection? to your PHONE = CELL?
USB cable?
go to yoiur CELL phone service provider
and get the proper application software package that makes this all work. After all VISTA is now offically dead at microsoft and HP.'
so only they can fix this.
No cell phone stated, so no real help possilbe.

what does sending mean, be more clearn on that please.
sending a file via usb
sending text via (what)
or?

How the printer is connected to PC Via USB or using Network Cable. If it is connected Netwrok cable than printer configuration page and on netwrok configuration there will be IP Address if this is valid IP Address than reinstall drivers and upgrade the Firmware of the printer.

If Printer is connected USB than try different USB Cable and try different USB Port on the computer
If USB port on the computer is working fine and check in Device Manager if the printer has detected as unknown device or not detected at all.
If detected as unknown device than reinstall printer driver if not detected at all than USB Port on the printer is faulty you need to set up hardware repair of the printer.

thats is solution,

Download and install the following software to install your 120GB External Drive: http://www.simpletech.com/support/support_downloads_storagesync1.42.php

Do you have anything like a printer or scanner or an external USB drive connected to the computer. If yes, then remove it. If not let me know.

I would recommend getting a card reader, remove your memory card from your camera and insert it into the card reader, connect the card reader into your computer via the USB port and download using Picasa3 which is free software from Google. Simple, fast and works for any camera

how to transfer picturesd from digital camera to pc just watch video

This sounds like a loose USB port. Have yo accidentally jolted it before by accidentally hitting a flash drive or a projecting USB plug. If so then it might be a loose plug on the motherboard and if one of those plg connectors hits another it will think there is a new device and try to install it. Take it to a shop or if you can go to www.repair4laptop.com and look up how to disasemble your laptop. Then resodder it in place - or take it to a shop. It may be expensive but the risk of damaging something else is less.

Make sure you are connecting directly to the computer's USB port, not through a hub. Try disconnecting other USB devices before plugging in the camera. Check the manufacturer's website for updaded drivers: if all else fails, a reinstall of the camera's drivers may be in order.