Are getting Sony Ericsson Update Service Flash not installed error after installing flash also?well its Sony Ericsson Update Service runtime error due to some little incompatibility of your system.Update your system as written below steps.
Application Error
Incompatible Macromedia version.
Required version available from
http://www.macromedia.com.
Application will terminate.[OK]
Here is screenshot of it

Well it’s just because you followed some wrong steps or due to some system crashes.
Step1: Get proper flash player.
Start Internet explorer and go to the www.adobe.com then install latest flash player.Restart computer and start Sony Ericsson Update Service again.
Step2:Followed step1 but didn’t work ?
You might have installed windows and using windows blinds themes.This may be incompatible with Sony Ericsson Update Service.
How to get ride of the problem?
Press n Hold CTRL key of keyboard while starting Sony Ericsson Update Service,preass n hold till Sony Ericsson Update Service starts.
Hope you have fixed the problem.