I have a Acer Aspire One
Intel Atom CPU N280 1.66GHz
2gb RAM
Video: Intel Mobile 945GSE Express Integrated Graphics Controller
It was running Windows Vista before, and was very slow. I tried to change to Ubuntu, but is even slower.
This computer is even certified in Ubuntu website: http://www.ubuntu.com/certification/hardware/200908-3469/
I installed the 32-bits as recomended for 2gb RAM.
The system works well, showing only problems in graphic parts, such as minimizing windows and opening the search window.
EDIT: I have searched the forum and I have seen many similar problems. and believe that problems are the graphic drivers and / or graphic efects. None of the other questions helped
The System Monitor is is showing the CPU usage at 100% constantly