D750_K750_W800_Update_Service_USB_driver Installation instructions :
1. Download the zip file to your computer. Remember where you put it.
2. Unzip the file to a temporary folder.
3. Turn off your phone.
4. Connect the USB cable to the PC but not to the phone.
5. Hold down the 'c' key and connect your phone to the USB cable.
6. This will start the Windows Found New hardware wizard that will be used during the installation.
7. Follow the instructions in the wizard; choose to "Install from a list ..", then press "Next".
8. Browse to the temporary folder created in step 2 above to point to the driver to install, then press "Next".
9. When the driver is installed, press "Finish".
W800_Signed_USB_Drivers Installation instructions :
1. Download the self-extracting installer file to your computer. Remember where you place it.
2. Double-click the W800_Signed_USB_Drivers.exe -file. Click 'OK' to extract the drivers and launch the installer.
3. Click 'Install' to install the drivers. When done the temporary files will be deleted.
4. To complete the installation, connect your W800 to your computer with the USB-cable. Windows will show information either in pop-up messages or in information balloons in the lower right corner of the screen.
5. You are now ready to use your W800.