[XPERIA X10 Q&A, Help & Troubleshooting] Will32:
Hi, sorry about your problem. I don't know a lot about this phone but ill give you the steps that got me going when I had a different issue.

This was in an email directly from Sony, hopefully it'll help, if not then at least I tried.

To Repair your phone Software, please follow the steps below:

Click on this link to download PC Companion http://www.sonymobile.com/us/tools/pc-companion/ .

Turn the phone off and disconnect it from the computer. Run the Software.

1. No matter what the program says do not connect the phone until you complete step 9.

2. In the welcome screen if asked click on Start, next you will be shown what Media Go offers, click on "next" then you will see a presentation on what Support Zone offers, click on "Finish".

3. In the next section from "Support Zone” and "Media Go" new select “Support Zone" and click on start.

4. On the next page select "Software Update" and click on "Start".

***At this point if you get an error stating that "unable to install update components" or "server is busy”, please proceed to step 12.

5. The program will say that there is no phone connected and will ask you to connect but disregard that and instead choose the option to "Repair Phone". (The program will issue you a warning on the content that you will lose during the update).

that any data saved only in your phone memory will be erased as part of the Phone Repair.

6. Choose Continue.

7. After that, the program will download the necessary information (several minutes) and it will present you with a list of phones.

8. Choose the X10 from the list (close to the bottom of the list) by clicking on the icon for the phone. Then click on "Next". Then you will see a new section telling you how to connect the phone. (Don't connect it yet!).

At this point the phone must be off and disconnected from the PC.

9. Connect the cable to the PC but not to the phone, then while pressing and holding the back key (the one on the lower right part of the screen that has the icon of an arrow pointing to the left on top) Connect the cable to the phone and keep holding the back key until the program says "The update of your phone has started..." (In some cases a message of "Installing drivers" will appear before the message of "The update of your phone has started..." is shown.).

10. If the steps were not followed exactly the phone will turn on and it will request that you "Proceed with the following steps, slide down the notification bar".

happens disconnect the phone from the cable, turn it off and repeat from step 9).

11. If PC Companion proceeds correctly with the update it will tell you to release the back key.

the update to finish and follow instructions on the screen.

12. If you receive the message: “Unable to install update components".

a. Close PC Companion.

b. Install Java from: http://www.java.com.

c. Start Pc companion again and try to do the software unlock process once more

As part of Sony Mobile's commitment to excellent customer service, we offer a wide variety of mobile products to suit your lifestyle. If you require more information, or have any other questions, please visit www.sonymobile.com or call us at 1-866-766-9374.