sorry, I am just very matter of fact.
I will say that,,,,,, in my opinion, Acer are not a very good system to begin with.
This might be a bit too much information, but it may help.
What would help is to get a hold of a plain vanilla Windows 7 OEM installation disk that doesn't have all the garbage in it.
I do not know at this time if Acer includes an install disk that is just a plain vanilla Win 7 install or not.
If so, wipe out the drive and reinstall windows, eliminating all their garbage. Then just install the Drivers
and software you want such as Microsoft Security Essentials. The system will run better.
Or, you can try uninstalling their stupid little tool bar and power management software and see if that helps. I can not remember what it is called.
I am not familiar with AMD so can not say if that processor is the cause.
But Windows 7 is not a slow OS by any means. It depends on the hardware it is run on.
Quite honestly, I run Puppy linux from Ram from time to time and it is not any faster than Win 7.
However, I will admit, depending on the hardware, Ubuntu is a bit snappier than Windows 7, but not by leaps or anything.
As for Windows Skinning, about the best alternative out there is StarDock WindowBlinds
From my limited experience with it,,, Can be flaky at times, but over all it's a good product.