Prompt [Q]Unstable Android OS on ghost tablet !

Hello everyone ! I have a Sunstech TAB10DUALC and the Android Os on the tablet is very unstable.The tablet has a quad core processor and 1Gb RAM but is crashes when opening Facebook,Chrome etc.It's a possibility to install a stable firmware considering i can't find the original firmware anywhere? I want to know if i can install (for example) Android os from Samsung Galaxy Tab on my tablet ! Or something like that!

I'm sorry if i post that in a wrong thread , i'm new on this forum and... ! Thank you for reading this and i hope you can help me !