cannot open case

qwertyjjj

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Jul 30, 2010
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I'm trying to open a 7 year old Acer E System 1201 for a friend.
It has never been cleaned and the fan is on full now probably because it's overhaeting.
I have removed every screw but the back will not come apart.
Any ideas? The manual does not contain any information on removing it / opening it up.