Generally if we connect our SE mobile through USB cable at times for bruteforcing or flashing then it wont work fine because our system does not consist the drivers of our mobile phone. So for that you need the drivers of our mobile phone.
Now the advantage of SE phones is they will instantly produce a backup into our system. I will tell how. Just switch of your mobile phone. Now press and hold 'c' button on your mobile phone and connect it with USB cable. Now until inserting the cable don't release the holded 'c' button. After you insert the cable wait for 1 to 2 sec and then release the button. Now a pop up will come in the system tray stating that a new hardware is found and a box for installing hardware comes on the screen. Now in that select not to connect radio button and then click next. Now after that click next and then your system will get a backup of the driver from your mobile. In this way you can get the drivers of your mobile installed in your system.
If you still have problem then you can download drivers from internet. Right now I have only W810 drivers. If you want you can DOWNLOAD.
If you want to add any patches or change the drivers or in complete sense if you want to modify any of your internal files of your Sony Ericsson W810i mobile first you need a complete backup of your mobile as in case if you delete any file by chance. Also if you need to change your camera or acoustic drivers first of all you need to have your original files as if any thing happens then you can restore these original files. So first of all keep the original files with you before doing anything crazy to your W810i. So for that I provide you with the complete backup of SE w810.
Download The Complete Backup
Now begin your crazy work with your W810.....Enjoy.