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Hi guys.
Today, I updated my Xperia Z1 to Android Lollipop 5.1 and I noticed that I have a new icon, this is weird. Before I didn´t have that...
Now, I can't remove this icon from my app menu.
Can you help me?
Could you post a screenshot so we see it?
It's done alexdon 
That might be one of your apps that you moved to external SD. What I suggest you to do is: go to settinga-apps-all,scroll down to xperia home. Tap on it,force stop and clear data. Restart.
There is also a thread about this:
/t5/Xperia-Z3-Compact/Xperia-Z3C-issue-after-transferring-apps-to-SD-card/m-p/970607#M9612
It didn't work... My Xperia doesn't have a little red sd card on this icon, And actually, I didn't have any app in the SD card before I updated it. I don´t know what's happening... u.u
Can you find this instalado app in settings-apps-downloaded?