Acer Aspire U5-710 Disassembly.

The Acer Aspire U5-710 all in one that I bought came shipped with a ridiculously slow 5400rpm Seagate hard drive (HDD), the hard drive always ticks 4 times at boot up and randomly ticks any time when I use this PC that usually lasts for 4-5 minutes. It's also pretty slow, the bootup time is slow and the applications start up very slowly when first booting the PC. - I bought and returned 4 of these PCs because they all came with faulty ticking hard drives, this time I just decided to put up with it and change it to an SSD after a year of purchasing this product.

I'm thinking of replacing the HDD with a solid state drive and I found a website called Mr Memory that found compatible hardware upgrades for my PC, but the only problem is how do I remove the back cover of this PC??

I don't see any screws at the sides so.. any help? 

Note: My PC is still under warrenty so I won't be doing it now, but I prefer having an answer earlier than late.