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hey today i took out my xperia u battery to check my si number , when i put it back and re- started it took like way longer than usual to boot , and when the unlock screen comes out and when i unlock it the whole phone just freezes then after a while the home screen appears with the message ' process failed ' with options force close and wait but none of then work..... then the phone just automatically re - boots
can someone help me out with this and tell me the cause of this problem
ps : my phone is not rooted and the bootlocker is still locked i also have warranty remaining will the company fix this for me ?
Solved! Go to Solution.
can i do this using pc companion or update servive if i can can u give me instructions on how to ..
thanks 
You can actually just run an update/repair with the phone powered off to get this running again:
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no problem:
1. Before you start you have to download the PC Companion software and install it on your PC.
2. Once installed on your PC, double-click the PC Companion icon on your desktop to start the update. Note! For some models you will be prompted to do a backup prior to the update and then restore.
3. Install and open PC Companion then select Support Zone.
4. Phone Software Update.
5. Start.
6. Repair Phone
7. Continue
8. Accept data removal
9. Next
10. Wait for prepare
11. Select Phone
12. Follow the connection steps
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ok sam i need your help
i tried this did everything u said but then pc companion comes up with a message saying there is no software update available for yout phone
what do i do now ? 
Sam wrote:
no problem:
1. Before you start you have to download the PC Companion software and install it on your PC.
2. Once installed on your PC, double-click the PC Companion icon on your desktop to start the update. Note! For some models you will be prompted to do a backup prior to the update and then restore.
3. Install and open PC Companion then select Support Zone.
4. Phone Software Update.
5. Start.
6. Repair Phone
7. Continue
8. Accept data removal
9. Next
10. Wait for prepare
11. Select Phone
12. Follow the connection steps
What are your thoughts about this forum? Let us know by doing this short survey.