Chinese tablet not showing apps in app drawer

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http://forum.xda-developers.com – Hi everyone. I just bought a chinese tablet, is this one: http://www.pandawill.com/amoi-q50-du...te-p69106.html The problem is that some apps are not showing in the app drawer, like for example contacts, os google talk. They are installed, becaused they show in the list from Settings->apps. I can't access those apps and other by any way!! I tried different launchers, but it's the same. Somebody know a fix or something? Thank you guys! (HowTos)