Sony Ericsson Xperia X10 — Stuck after updating my xperia X10 2.1 to 2.3

my X10 was running with android 2.3 and last time it stuck after a virus attack.then i sent it to the work shop and they have install android 2.1-update 1.every time i attempted to update to 2.3 by using sony update service it got stuck.this is the 4th time.Why is this happen????? Plz help me........!!!!!!
Firmware 2.1-update 1
baseband 2.0.49
kernal2.6.29
build number 2.0.2.A.0.24

So its just getting stuck in the middle of the update? Is there an error message?

I'm assuming its an official OTA update your referring to correct?

No after updated.....sony ericsson logo sappers and then restarts....again and again it happens until battery has been removed.