Keeps on rebooting

[ReDSteeL]

please help!
just had the unit 3 weeks ago, after the update i noticed that my unit keeps on hanging. it never hanged before the update.Then i charged my unit while the power is off. and when im about to turn on the phone it boots the SONY logo, then XPERIA logo, and the loading fire deisgn will repeat 2 times then hangs in the middle while booting up. and restarts the phone over and over again. ive managed to let it be by about 15min and it keep doing the sme thing ive switch the red hard resset button, again and again but to no avail, please help i love this phone! tried the power button and volume up (pressed simultaniuosly) but to no still to no avail it wont boot up. 

[Uliwooly]

Connect your phone to a wall charger > press and hold power & volume up > let it charge for 1 or 2 hours > after 1 - 2 hours repair it with SUS 

Update Service (SUS)

http://www.sonymobile.com/gb/tools/update-service/

[ReDSteeL]

can i repair it without a factory reset?

[Uliwooly · Accepted solution]

I don't see any other way around it 

[ReDSteeL]

Thank You! it worked!

[erick]

What about the intermittent "UNFORTUNATELY, XPERIA HOME MENU STOPPED." Then I have to turn off, turn on the unit.
Unfortunately, its frustrating! Anyone with solution?

[Uliwooly]

Anytime  

[Uliwooly]

@erick 

if you have taskillers, antivirus, task managers, battery apps, etc?