Yeah, ur gona need a desktop or a new laptop with some mure umph to it.. 1.8ghz is kinda week for modern gaming even if its a quad core because most games poorly utilize all cores.
The graphics card is also an issue. Integrated graphics as a rule generally suck for gaming. If it was a desktop i woulda recomended adding in a graphics card and possible overclocking the CPU but since you cant get past the graphics card issue overlclocking the CPU would me a moot point..
Good luck and sorry. wish we coulda had better news.
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