Netflix audio/video stuttering
Hardware Overview:
Model Name: MacBook
Model Identifier: MacBook2,1
Processor Name: Intel Core 2 Duo
Processor Speed: 2 GHz
Number Of Processors: 1
Total Number Of Cores: 2
L2 Cache: 4 MB
Memory: 2 GB
Bus Speed: 667 MHz
Boot ROM Version: MB21.00A5.B07
SMC Version (system): 1.17f0
System Software Overview:
System Version: Mac OS X 10.5.8 (9L31a)
Kernel Version: Darwin 9.8.0
Boot Volume: Macintosh HD
Boot Mode: Normal
So I've had this issue with streaming Netflix Instant play videos on 3 different browsers: Safari, Firefox, and Chrome. Streaming works well for a variable amount of time, from 1 minute to 10 minutes. Then, the playback gets choppy and the audio stutters. During this time, when I try to move the cursor there is a significant delay. It's as if my computer is too slow to handle the streaming. But everything else from youtube to hulu works fine.
I've been told by Netflix that this problem is processor related. Everytime I'm streaming, their statistics are showing that my processes are eating up 90+% of the CPU. When I go to Activity Monitor, I see Silverlight plugin (which is what Netflix unfortunately streams through) is the only thing that's causing the high usage.
Netflix has said I should uninstall Silverlight 3 and run an older version. Did that...no success.
Then, they said I should defrag my hard drive but did not give me specifics on how to do it. So when I googled it, I pretty much came to the conclusion that a Mac does not need to be defragged, and even if I did it, the results will be miniscule. So I'm not gonna throw away $20-$40 to buy some stupid 3rd party defrag tool when I don't need it.
So I've come to you, Mac community. What do you think I should do now to fix my choppy audio/video problem?
MacBook, Mac OS X (10.5.8)