Ok, maybe change your keyboard. I've had a similar issue with my laptop keyboard doing aaaaaa.
I solved the problem with a software to disable the key in the registry
Every thing seems perfect to me. I prefer i-7 processors to this build, but its still ok. Maybe you wan to compare here: PassMark Intel vs AMD CPU Benchmarks - High End
Also, I would choose a caviar Black edition: much faster. I have 5 of them and I'm really satisfied
Hope it helps
Your computer seems fine. The only thing that will be needed for change is processor. Maye check for intel i-7 serie. You'll surelly be pleased with them. For the rest, your comp is great.
This is probably due to the new ballot of windows in europe boosting their downloads. They wanted to acheive the version 10.5 so fast, they needed to correct some bugs after that