[XPERIA X10 Q&A, Help & Troubleshooting] Patricks_book:
when it just wont work

CHARGE PHONE TOO 100% BEFORE STARTING ANYTHING.:D

First ALL FLASHTOOLS Have to be done in Administrator mode on your PC/laptop and this may also fix that messed up usb port you seem to have on it to. You should NEVER charge you phone for more then 2ish hours in fact it should only take about 1.5 to 2 hours if not then you have a bad one. Also you should check that your usb drivers are up to date before you start. And Be Patient.

Had the same problem last year. What you need to do is uninstall all Se software Pc Companion an Se update Sevice and all Java.

If you have a registry cleaner and or an uninstaller (not windows) like Revo Uninstaller free or Pro use it to uninstall an clean registry. (BUT NOT IN Administrator Mode only Flashtool needs this)

Do a disk clean up Local Disk C:drive/right click properties/click disk cleanup/click all boxes/Click run/clean.

Reboot wait till stack OS/drive light stops flickering (stops loading).

Yes boot again.

Reboot wait till stack OS/drive light stops flickering (stops loading).

The first boot sets up your cleanup the second boot starts a fresh boot cycle again wait for full load up light stops.

Reinstall all programs letting them update them self. JAVA first Pc Companion then Se update Service rebooting on each one NOT all at once (waiting till stack OS/drive light stops flickering (stops loading) each time.

This helps your stack/drive stay clean.

If you do not have 7zip (free) you should get it now an download an install it reboot PC (waiting till stack OS/drive light stops flickering (stops loading).

When connecting phone to PC use a different USB port then the one you used at first.

Now Start Pc Companion and let it do it's thing, do as it says, connecting phone to update Pc Companion to it.

Then do the same for Se update doing as it says and do an update and/or repair.

If it says to unplug or plugin USB just unplug/plugin the USB on the PC not the phone and making sure that you put it back in the same USB port.

Create a folder on C: drive:

Right click Start/Explore/Click (high light) Local Disk(C) click file/new/folder/

right click new folder/rename/Flashtool version ?.?.?

Download And Save to Folder you made on the C: drive

Firmware Files:

(use a Stock/Generic firmware first like 2.1.1 for your region)

http://xdaforums.com/showthread.php?p=10738287#poststop

http://xdaforums.com/showthread.php?p=10738467

FlashTool version ?.?.?

http://xdaforums.com/showthread.php?t=920746

Install Flashtool on C: drive:

After downloading file to folder go to file and in it a rar file

Right click 7zip file/Select Extract to Flashtool ?.?.?

Reboot wait till stack OS/drive stops loading (light stops flickering).

When using Flashtool do not unplug USB from PC and when plugging in for flashing just remove battery plug mini USB in phone hold back button an put battery back in.

While Flashing NEVER TURN OFF/CLOSE FLASHTOOL until the phone is up and working completely.

After putting firmware in folder.

Right Click/x10Flashtool/Click Run As Administrator.

And follow the instruction in all the guides and all should be good.

NOW READ THIS POST FIRST

And use a STOCK FIRMWARE to get started with and watch the video and he has other one for how to's

http://www.youtube.com/watch?v=B9_pFOxPJUY

http://xdaforums.com/showthread.php?t=928343

SE Firmware Files

http://xdaforums.com/showpost.php?p=10879519&postcount=2

And this thread it has some good stuff.

http://xdaforums.com/showthread.php?t=955703

Thank you DooMLoRD Senior Member For Guides,Tools and Roms.

Please remember to Please Click the Thanks button if this helped you. For all the Developers in the posts. A lot of work went in to this stuff.