Error prompts while upgrading the Sony Ericsson Xperia X10 phones

Hi all,
My wireless company finally provided the Android 2.1 upgrade for its Sony Ericsson Xperia X10 phones. However, when I attempted the upgrade, it instructed me to use the Sony Ericsson PC Companion software for the upgrade, but it kept on generating this error prompt, which I have posted.

Most phone helper applications tend to require the computer to restart for registration when done installing drivers. So, I restarted, but I still received the same error message. I already tried to restart it under different conditions like with the phone on, and phone off, but it made no difference.
What should I do about it? Any help is appreciated.
Thanks a lot.
