High CPU when using zoom fonction - Reader 11.0.03

Hello,
I've noticed the following problem on a 2008 R2 remote desktop server.
When an user make a zoom in a pdf document, the CPU usage reach 100% usage et stay at this level for about 10 secondes and the screen freezes.
All the users are impacted by CPU's peak and are blocked, they can't work for 10 secondes.
Did anyone have encounter this problem and solve it ?
Excuse my english , it's not my native  language.

C>Programs>Adobe>Reader 11>Reader...
Look for a file named eula.exe (or just eula)
Double click it.
Accept the license agreement.
You're good to go

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