k750i problems/driver

Ive recently tried upgrading my phone to a w800i and may have done something wrong..After removing my sim and battery ,then replacing the bat. I then held "c" button and connected the usb from my PC...The connection wizard apeared but found nothing..I tried for hours to try and get the micrsoft server to appear (as i was told it should) but nothing.So I tried another USB port and the wizard apeared again....Ive used all my ports now all 5 of them and now none of them work or recognise my phone(nothing) ONLY other devices ....What have I done to my phone/driver? AND is there an Quick and Easy way to get my k750i working as a w800i/w810i???? IM HAPPY TO ANSWER ANYONES QUESTIONS if I can for Example:What is the name of the song in the Corsa advert with the Knitted dolls(The C'MONS) which goes"Cruzin' Cruzin' " by Sean Paul....I know the answer !:D

now ur mobile isn't anymore a K750i but a W800i, so u have to install drivers for ur "new" mobile

go to google and search up w800 flash/usb drivers
it happened to me too so relax, it just means your phone is ok and you flashed successfully

or a better idea are torrents...search there and u'll fine anything u want about ur problem..

...you dont need to torrent drivers...sony ericsson site provides them under their support downloads...